Dell Chromebook 3120 Chromebook 11-3120 Disassembly and Reassembly Guide - For
Dell Chromebook 3120 Manual
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- Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 1
Dell Chromebook 11 - 3120 Disassembly and Reassembly Guide Warning: This manual is intended for use by a Dell Certified Technician. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product. - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 2
potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Copyright © 2015 Dell Inc. All rights reserved. This product is protected by U.S. and international copyright and intellectual - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 3
Chassis This section provides information about the chassis for the Dell™ Chromebook 11 (3120) system. 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 4
Top View The Dell™ Chromebook™ 11 (3120) system top view and features are as below: 1/2 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 5
Chassis Top View Features and Locations Label Description 1 Webcam LED 2 Webcam 3 Microphone 4 Speakers 5 Power Button 6 A-Cover LED ( Interactivity LED) 2/2 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 6
Left View The Dell™ Chromebook™ 11 (3120) system left view and features are as below: Chassis Left View Features and Locations Label Description 1 DC-in Jack 2 USB 3.0 with BC (Battery Charging) 1.2 3 HDMI 4 Audio in Jack 5 SD Card Reader 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 7
Right View The Dell™ Chromebook™ 11 (3120) system right view and features are as below: Chassis Right View Features and Locations Label Description 1 Battery LED 2 SIM Card Slot 3 USB 2.0 4 K-Lock Slot 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 8
Bottom View The Dell™ Chromebook™ 11 (3120) system bottom view and features are as below: Chassis Bottom View Features and Locations Label Description 1 Express Service Code 2 Service Tag 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 9
, charge level less than 10%, machine in S0 or S3 state Blinking Amber Battery error Dell Activity Light Chromebook 11 (3120) comes with a 7 color Dell Activity light LEDs outside of the LCD back cover which can be use for interactivity between students and teachers. For more information about - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 10
LED Light Status Dell Activity Light Chassis LED Light Blue Red 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 11
Yellow Others Webcam LED 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 12
Chromebook 11 (3120) will have a webcam LED indicator on the LCD bezel, as shown in the image below. Webcam Status LED LED Light Status Description Off Webcam off White Webcam on 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 13
as follows: Safety Precautions - Generic safety precautions for every service event. Tools & Utilities - Hand tools needed to service the Dell™ Chromebook™ 11 (3120). Need to Know - Information and instructions for the Chromebook that requires additional attention. This section may contain critical - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 14
Power Dell products with standby power must be completely unplugged before the case is potential. This is done through the use of a Field Service ESD kit. When connecting a bonding wire, always ensure be obvious, such as intermittent problems or a shortened product life span. As the industry pushes - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 15
semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in earlier Dell products. For this reason immediately recognizable. The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded") failure. The - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 16
be snug and the bonding wire should be connected to the mat and to bare-metal on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly on the mat. Remember, the only safe place for ESDsensitive items are in your - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 17
physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 18
unmonitored kit, it is best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are insulators and often highly charged. - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 19
Components When transporting ESD-sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in eld service engineers use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 20
your feet apart for a stable base, and point your toes out. 2. Bend your knees. Do not bend at the waist. 3. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load. 4. Lift with your legs, not your back. 5. Keep the load close. The closer it - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 21
Tools Required A set of required and optional tools are necessary to service the product. 1. Small Phillips-head screwdriver, size #1 2. Small Phillips-head screwdriver, size #1 3. Plastic scribe 4. Small flat-head screwdriver 5. Tork 5 screwdriver 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 22
Disassembly and Reassembly This section covers all the disassembly and reassembly of the Dell™ Chromebook™ 11 (3120). 1/1 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 23
Sim Card Disassembly Sim Card Disassembly Video PREREQUISITES Pre-removal parts: 1. None Sim Card Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 24
Sim Card Disassembly 1. Remove the T5 screw. 2. Remove the cover. 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 25
3. Use the push pin to eject the sim card. 4. Remove the sim card. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 26
The removal is complete. Sim Card Reassembly 1. Insert the sim card. 2. Close the cover. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 27
3. Tighten the T5 screw. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 28
Bottom Cover Disassembly Bottom Cover Disassembly Video PREREQUISITES Pre-removal parts: 1. None Bottom Cover Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 29
Bottom Cover Disassembly 1. Loosen the seven (7) screws securing the bottom cover. 2. Pry up the bottom cover carefully, starting from the top corners. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 30
3. Lift up and remove the bottom cover. The removal is complete. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 31
Bottom Cover Reassembly 1. Replace the bottom cover back into its original location. 2. Gently push the cover back to make sure that it is secured in place. 3. Tighten all seven (7) screws. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 32
Battery Disassembly Battery Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover Battery Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 33
Battery Disassembly 1. Remove the two (2) screws that secure the battery in place. 2. Slowly pull the battery to disconnect the battery cable from system board, and remove the battery from the system board. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 34
The removal is complete. Battery Reassembly 1. Place the battery back into its original location. 2. Reconnect the battery cable. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 35
3. Tighten the two (2) screws to secure the battery in place. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 36
WLAN Card Disassembly WLAN Card Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery WLAN Card Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 37
WLAN Card Disassembly 1. Remove the cable holder securing the antenna cables. 2. Disconnect the antenna cables from the WLAN card. 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 38
3. Remove one screw securing the WLAN card. 4. Remove the WLAN card. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 39
The removal is complete. WLAN Card Reassembly 1. Place the WLAN card back into its original location. 2. Reconnect the antenna cable. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 40
3. Tighten the one (1) screw to secure the WLAN card in place. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 41
I/O Daughter Board Disassembly I/O Daughter Board Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. WLAN Card I/O Daughter Board Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 42
I/O Daughter Board Disassembly 1. Carefully disconnect the Flex cable. 2. Remove the two (2) screws securing the I/O daughter board in place. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 43
3. Lift up and remove the I/O daughter board. The removal is complete. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 44
board back into its original location. 2. Reconnect the Flex cable. 3. Tighten the two (2) screws to secure the I/O daughter board in place. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 45
System Board Disassembly System Board Disassembly Video PREREQUISITES Remove the following parts: 1. Bottom cover 2. Battery 3. WLAN card System Board Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 46
System Board Disassembly 1. Disconnect the 1) I/O cable, 2) touch pad, 3) keyboard, 4) speaker, 5) DC-in jack, and 6) eDP cables. 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 47
2. Remove the nine screws. 3. Lift up and remove the system board. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 48
perform RMA Shim after the system board replacement. For more information, please see RMA Shim. NOTE: The RMA Shim USB key will be dispatched or bundled together with the replacement system board. The RMA Shim USB software on the USB key is the service-lite version, which will only contain the - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 49
the system board back into its original location. 2. Reconnect all the cables. 3. Tighten the nine screws to secure the system board in place. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 50
Speakers Disassembly Speakers Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery Speakers Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 51
Speakers Disassembly 1. Disconnect the keyboard, touchpad, and I/O cables. 2. Disconnect the speaker connector from the system board. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 52
3. Unthread the speaker cable and remove the speakers. The removal is complete. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 53
Speakers Reassembly 1. Place the speakers back into their original location. 2. Reconnect all the cables. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 54
DCIn Jack Disassembly DC-In Jack Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery DC-In Jack Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 55
DCIn Jack Disassembly 1. Disconnect the DC-In jack connector from the system board. 2. Remove the screw securing the DC-In jack in place. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 56
3. Lift up the DC-In jack. The removal is complete. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 57
the DC-In jack back into its original location. 2. Tighten the screw to secure the DC-in jack in place. 3. Reconnect all the cables. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 58
LCD Assembly Disassembly LCD Assembly Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery LCD Assembly Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 59
LCD Assembly Disassembly 1. Disconnect the eDP and wireless cables. 2. Remove the four (4) screws. 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 60
3. Lift up the two (2) hinges. 4. Lift up the palm rest and remove it. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 61
The removal is complete. LCD Assembly Reassembly 1. Place the LCD Assembly back into its original location on the palm rest. 2. Reconnect all the cables. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 62
3. Tighten the four (4) screws to the system base. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 63
LCD Bezel Disassembly LCD Bezel Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. LCD Assembly LCD Bezel Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 64
LCD Bezel Disassembly 1. Remove the two (2) mylar screw covers. NOTE: The screw cover on the LCD bezel is made up of a mylar sticker, and it can be hard to remove with just a normal plastic scribe. To remove this screw, simply use the regular Philips 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 65
driver and puncture the mylar cover. 2. Remove the two (2) screws. 3. Pry from the bottom and work your way up. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 66
4. Remove the bezel. The removal is complete. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 67
LCD Bezel Reassembly 1. Place the LCD Bezel back into its original location. 2. Tighten the two (2) screws to secure the bezel in place. 3. Replace the mylar screw covers. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 68
LCD Panel Disassembly LCD Panel Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. LCD Assembly LCD Panel Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 69
LCD Panel Disassembly 1. Remove the four (4) screws. 2. Lift the LCD up and rotate it 180 degrees. 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 70
3. Remove the connector. 4. Remove the LCD. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 71
The removal is complete. LCD Panel Reassembly 1. Place the LCD Panel back into its original location and reconnect the connector. 2. Tighten the four (4) screws to secure the LCD panel in place. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 72
AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 73
Camera Disassembly Camera Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. LCD Assembly Camera Establishing image. 1/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 74
Camera Disassembly 1. Pry the camera out from the sticky base. 2. Disconnect the camera cable and remove the camera. 2/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 75
The removal is complete. Camera Reassembly 1. Place the camera back into its original location. 2. Reconnect the connector. 3/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 76
AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 4/4 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 77
Left/Right Hinge Disassembly Left/Right Hinge Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. LCD Assembly 4. LCD Bezel Left / Right Hinge Establishing image. 1/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 78
Left/Right Hinge Disassembly 1. Remove the four (4) screws on each hinge (eight (8) screws in total). 2/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 79
2. Remove the hinges. 3/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 80
The removal is complete. Left/Right Hinge Reassembly 1. Place the left and right hinges back into their original location. 2. Tighten all eight (8) screws to secure the left and right hinges in place. 4/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 81
5/5 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 82
eDP Cable Disassembly eDP Cable Disassembly Video PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. LCD Assembly 4. LCD Bezel eDP Cable Establishing image. 1/3 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 83
eDP Cable Disassembly Disconnect the eDP cable from the camera and unthread it to remove the eDP cable. The removal is complete. 2/3 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 84
eDP Cable Reassembly 1. Reconnect the cable to the camera. 2. Place the eDP Cable back into its original location. AfterService Instructions 1. Reconnect the system to its electrical outlet. 2. Turn on the system and attached peripherals. 3. Let the system boot. 3/3 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 85
and touchpad are not separate removable parts; they are part of the palm rest assembly. PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. WLAN Card 4. I/O Daughter Board 5. System Board 6. Speakers 7. DC-In Jack 8. LCD Assembly Palmrest (Base) Establishing image. Palmrest Reassembly - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 86
Replace the pre-removal parts in descending order. 2/2 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 87
for non-touch systems. For touch systems, there is a touch hinge LCD assembly available to be dispatched. PREREQUISITES Pre-removal parts: 1. Bottom Cover 2. Battery 3. WLAN Card 4. I/O Daughter Board 5. System Board 6. Speakers 7. DC-In Jack 8. LCD Assembly 9. LCD Bezel 10. LCD Panel 11. Camera 12 - Dell Chromebook 3120 | Chromebook 11-3120 Disassembly and Reassembly Guide - For - Page 88
LCD Back Cover Reassembly Replace all the pre-removal parts in descending order. 2/2
Dell Chromebook 11 - 3120
Disassembly and Reassembly Guide
Warning: This manual is intended for use by a Dell Certified Technician.
Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.