Ok, weird problem on my 27" Viewsonic ; model VX2753MH-LED. On HDMI, it works for about 4-5 minutes ; then resets to the viewsonic logo and does this over and over again. On VGA ; the display lasts much longer -- maybe an hour or more sometimes but then finally resets and does it frequently afterwords.
I can post pics ; there is one PCB board inside of the unit ; the one which 19v 3A power supply unit is connected. And a PCB above it connected with a wide ribbon cable ; I guess that's the display attachment / backlight inverter assembly or something...
1. Replaced all the caps on the video input board ; obviously just the large ones not the SMD caps and no difference.
2. Tested the (external) power supply ; and it's steady at 19v. Tested the board itself ; to see if it was getting 19v after the plug ; and it seems to be fine.
3. Tried running the display without the connector between the (backlight pcb?) and the video input board. Display turns on (white) ; does not turn off or reset ; so this does appear to be a problem with the input board.
On the board there are two 330uH coils ; I was thinking about replacing those next. Any ideas? I'd love to have this big display back in action
I can post pics ; there is one PCB board inside of the unit ; the one which 19v 3A power supply unit is connected. And a PCB above it connected with a wide ribbon cable ; I guess that's the display attachment / backlight inverter assembly or something...
1. Replaced all the caps on the video input board ; obviously just the large ones not the SMD caps and no difference.
2. Tested the (external) power supply ; and it's steady at 19v. Tested the board itself ; to see if it was getting 19v after the plug ; and it seems to be fine.
3. Tried running the display without the connector between the (backlight pcb?) and the video input board. Display turns on (white) ; does not turn off or reset ; so this does appear to be a problem with the input board.
On the board there are two 330uH coils ; I was thinking about replacing those next. Any ideas? I'd love to have this big display back in action

Comment