IBM 15” Service Manual
33
8.2 Trouble Shooting
8.2.1 Main Board
1.NO SCREEN APPEAR
Note: 1. if Replace “
MAIN-BOARD
” , Please re-do “DDC-content” programmed & “WHITE-Balance”.
2. if Replace “
Power Board
” only, Please re-do “ WHITE-Balance”
Check CN504 pin 10 = 2.5 V?
Check CN504 pin 8 = 3.3 V?
Check CN504 pin 4 = 5 V?
Check Correspondent component.
Is there any shortage or cold solder?
Check Power Board.
Yes .there have OSD show
Yes, all DC level exist
Disconnected the Signal cable( Loose the
Signal cable ),Is the screen show “Cable Not
Connected” ?
Connected the Signal cable again,
Led Green
Replace U202
Flash Rom
No, nothing is show
Connected the Signal cable
again, Check LED status.
Check Power switch is in Power-on
status and check if Power switch had
Led orange
Led Green
Check the Wire-Harness from CN501 or CN502
H,V Input at U106 pin 4,2 ,was there
Check digital signal from CN101
Check Correspondent
component
short/open
and Signal cable
NG
Check
Check
U203 Data-output
Replace
Power board
Inverter
Re-do White balance adjust
Measured Crystal X201(14.318MHz)
OK
Содержание ThinkVision L150
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