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Dell Vostro 3471 Service Manual - Page 57

Installing the power supply unit PSU

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Installing the power supply unit PSU 1. Slide the PSU towards the back of the computer until it snaps into place. Removing and installing components 57

Section	Page
Dell Vostro 3471 Service Manual	2
Working on your computer	5
Safety instructions	5
Turning off your computer — Windows 10	5
Before working inside your computer	5
After working inside your computer	6
Technology and components	7
USB features	7
HDMI 1.4	8
Removing and installing components	10
Recommended tools	10
Screw size list	10
System board layout	11
Cover	11
Removing the cover	11
Installing the cover	13
Front Bezel	13
Removing the front bezel	13
Installing the front bezel	15
Cooling shroud	17
Removing the cooling shroud	17
Installing the cooling shroud	18
Expansion card	19
Removing the PCIe X1 expansion card-optional	19
Installing the PCIe X1 expansion card–optional	21
Removing the PCIe X16 expansion card–optional	23
Installing the PCIe X16 expansion card–optional	25
Installing PCIe expansion card in slot 1– optional	27
3.5-inch hard drive chassis	30
Removing the 3.5-inch hard drive chassis	30
Installing the 3.5-inch hard drive chassis	32
3.5-inch hard drive	34
Removing the 3.5-inch hard drive from the hard drive bracket	34
Installing the 3.5-inch hard drive into the hard drive bracket	35
Drive cage	36
Removing the drive cage	36
Installing the drive cage	37
Optical drive	39
Removing the optical drive	39
Installing the optical drive	40
M.2 SATA SSD	41
Removing M.2 SATA SSD	41
Installing M.2 SATA SSD	41
WLAN card	42
Removing the WLAN card	42
Installing the WLAN card	43
Heat sink assembly	44
Removing the heat sink assembly	44
Installing the heat sink assembly	46
Memory modules	48
Removing the memory module	48
Installing the memory module	49
Power switch	50
Removing power switch	50
Installing the power switch	52
Power supply unit	54
Removing the power supply unit PSU	54
Installing the power supply unit PSU	57
Coin-cell battery	60
Removing the coin cell battery	60
Installing the coin cell battery	61
Processor	62
Removing the processor	62
Installing the processor	63
System board	64
Removing the system board	64
Installing the system board	69
TPM 2.0 installation	74
Installing Dell TPM Update Utility for Windows or DOS	74
Enabling firmware TPM in China	75
Troubleshooting	77
Enhanced Pre-Boot System Assessment — ePSA diagnostics	77
Running the ePSA Diagnostics	77
Diagnostics	77
Diagnostic error messages	78
System error messages	81
Getting help	82

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Installing the power supply unit PSU

Slide the PSU towards the back of the computer until it snaps into place.

Removing and installing components