820-3209 no video

bartech

Member
No video , lcb get black but nothing more .
F9700 - 1,2 - 8.6 v
U9701
3-r9715 - 0,22v
4-r9704- 0v
5-0.05v
6,7-0,02v
8-r9714-0v
9-r9716-0,06v
11-c9710-5,05v
12-r9741-0v
14-r3840- 3,32v
15-r9719- 0,15v
16-5,05v
17-r9755-0v
18-r9753-3,32v
19-r9757-3,32v
 

2informaticos

Administrator
Staff member
Yo've said no video.
If no image, no reason to search for backlight.
As per your notes, missing BKL_EN/PWM; no reason to waste time on backlight circuit, is not even enabled.

Do you get 3V at pins 18/19 of J9000 (at least when hear chime)?
If yes, pin 14 should go high at same time.
Check with LCD connected...
 
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