IBM 6656HG2 Service Manual - Page 15

No Raster Osd Is Not Displayed - Inverter

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Page 15 highlights

2. NO RASTER (OSD IS NOT DISPLAYED) - INVERTER NO RASTER (OSD IS NOT DISPLAYED) J703 PIN10 12V? YES J703 PIN5 5V? YES J703 PIN1 5V? YES NO CHECK ADAPTER NO CHECK MICOM INV ON/OFF PORT. 1. CONFIRM BRIGHTNESS NO OSD CONTRL STATE. 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL. (CONTACT PROBE TO CAUTION LABEL. CAN YOU SEE PULSE AT YOUR SCOPE? YES REPLACE CCFL LAMP IN THE LCD MODULE NO - 15 - REPLACE INVERTER ASS'Y

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2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER
CHECK MICOM INV
ON/OFF PORT.
J703 PIN5
5V?
NO
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK ADAPTER
J703 PIN10
12V?
NO
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
J703 PIN1
5V?
NO
REPLACE
INVERTER ASS’Y
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
NO
REPLACE CCFL LAMP
IN THE LCD MODULE
YES
YES
YES
YES