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Acer AT4220A AT4220A Service Guide - Page 70

VGA/DVI No Sound

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VGA/DVI No Sound M PC/DVI can Display ? Mute turn off Volume set to 50 Audio Line in Cable Plug IN? Sound Normal ? END no Check Video cable or PC or Replacement VGA/DVI cable no Check Line in cable or Replacement Line in Cable no Replacement Main/B 63 Chapter 3

Section	Page
SG_AT4220A_CH1.pdf	7
LCD Panel	7
I/O Functions	7
Video Functions	7
Mechanical	7
Multi-Sound System	7
Power Source	7
Remote Control	8
Speaker	8
Others	8
Basic Connection	21
Connecting the Power Cord	21
Connecting an Antenna/Cable	22
Getting Started Watching Your TV	22
Connecting External Audio/Video Device	24
Connecting a DVD, VCR, STB or Audio/Video Equipment	24
Connecting a Camera, Camcorder or Video Game	27
Connecting a PC or Notebook Computer	27
Selecting the Input Source	29
OSD Navigation	30
Navigating the OSD with the Remote Control	30
Adjusting the OSD Settings	30
Empowering Technology	33
Set-up Empowering Mode	33
Default Setting in Different Empowering Mode	33
Advanced Features	36
PIP/PBP/POP	36
Lock TV	38
Hardware Specification and Configuration	39
Electro/Optical	39
Firmware Specifications	40
Performance Specifications	41
Power Supply Electrical Specifications	41
Overall Dimension	42
Environment Requirements	42
Vibration Test	43
Drop Test	43
Multi Picture	44
Board Placement	52
LCD No Backlight	59
Remote Control No Function	60
RF No Display	62
COMPONENT1 and COMPONENT2 No Display	63
AV1 and AV2 No Display	64
VGA No Display	66
DVI No Display	67
HDMI No Sound	69
VGA/DVI No Sound	70
COMPONENT No Sound	71
Parts	74

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