Service Manual
Chapter 3. Troubleshooting Guide
Problems
Condition
Probable Reasons
Solutions
1. Blank Screen 1. Sound only, no picture. 1. Parts failure.
Change all the parts
below
1. X2
2. REG5
3. U1
2. Buttons don’t 1. Buttons malfunction.
work
1. Micro SW NG
1.Change Micro SW
3. incorrect color 1. VGA output malfunction. 1. Parts failure.
display
1.Change U15
4. LED no lit
1. no power.
1.LED failure
1.IR1 failure
1.Change LED
1. .Change IR1
5. Remote not
functions
1. Remote control
malfunction.
6. No TV image 1. Display malfunction.
7. Black & white 1. Only black and white
1.TDA8275 NG
1.X’TAL NG
1.Change Y301
1.Change X2
image only
color in TV,AV,SVHS
modes.
8. No display in 1. No display in AV,SVHS 1.SAA 7135 NG
1.Change U5
1.Change X1
AV,SVHS
modes
modes.
2. display correctly in TV
mode.
9. PIP MODE
malfunction
1. The desktop can not
work in PIP MODE
1.X’TAL NG
Version 1.0
Page 15
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