hello there,
I am trying to fix a Walker 40 TV - it has Vestel 17IPS71 3R3 as PSU and 17MB82S for logic.
How I got here...
The TV had shorted USB connector, which I fixed. TV turned on. Ran for a few hours on HDMI input. Started to see some dark dots/patterns on the screen as seen on the photo.
I restored to factory setting. The TV has rebooted only to a blinking standby LED. It sat there for a number of minutes after which I disconnected it.
Now, after plugging it back in - there is not even a standby LED.
My 17IPS71 provides 12V, no standby though. There is no Q1 or surrounding elements at all - as per the diagram it should provide 5V standby. I must have some variant of the board?
However, the logic board provides 5V STANDBY at U46.
I checked power to ICs on the logic board, they have steady 12/5/3.3V.
What gives? I'm at loss here... Next step would probably be to hook up UART to SCART, but something tells me I should be getting standby LED in first place?
Any help greatly appreciated
I am trying to fix a Walker 40 TV - it has Vestel 17IPS71 3R3 as PSU and 17MB82S for logic.
How I got here...
The TV had shorted USB connector, which I fixed. TV turned on. Ran for a few hours on HDMI input. Started to see some dark dots/patterns on the screen as seen on the photo.
I restored to factory setting. The TV has rebooted only to a blinking standby LED. It sat there for a number of minutes after which I disconnected it.
Now, after plugging it back in - there is not even a standby LED.
My 17IPS71 provides 12V, no standby though. There is no Q1 or surrounding elements at all - as per the diagram it should provide 5V standby. I must have some variant of the board?
However, the logic board provides 5V STANDBY at U46.
I checked power to ICs on the logic board, they have steady 12/5/3.3V.
What gives? I'm at loss here... Next step would probably be to hook up UART to SCART, but something tells me I should be getting standby LED in first place?
Any help greatly appreciated
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