IndiaReFix - Laptop & TV Repair Forum

LENOVO G570 NO DISPLAY ONLY BACKLIGHT ON

MB- PIWG2 LA-675AP REV 1.0

PROBLEM-

NO DISPLAY ONLY LED LIGHT COMING


DIGNOSIS

CHECKED WITH PENDRIVE EXTERNAL DISPLAY COMING
MEAN DATA COMING IN USB

THEN CHECKED WITH OTHER DISPLAY PANEL SAME ISSUE

THIS LED DISPLAY WORKING FINE IN OTHER BOARD

THEN CHECKED WITH OTHER CABLE LED ALSO SAME ISSUE

THIS CABLE WORKED IN OTHER BOARD

THEN GO TO CHECKED FOR LCDVDD VOLTAGE ALL ARE FINE (3.3V)

LED VOLTAGE ALSO OK 19V

THEN I SUSPECTED FOR ISSUE IN PCH

THEN I CHECKED PCH FOR LVDS SECTION AND FOUND +VCCTX_LVDS IS MISSING (1.8V)

THIS VOLTAGE IS GOING TO PCH THROUGH L2 COIL LINE

THIS L2 IS OPEN

RESOLUTION
,,,,,,,,,,,,,,,,,,,,,,,,,,,,

JUST PUT A JUMPER IN L2 AND CHECKED WORKING FINE

THEN DISPLAY IS COMING

good post sir

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very good troubleshooting technic professional

gooooooooooooooooooood

super sir

Very nice

good job

good work

good work

good job sir