Problems with Model 4 display

[John(Wales-UK)]

Hi

My Model 4 has developed a fault where the screen grow and shrink very slightly, much like the old power supply / disk access issue. However, the disks are not spinning and a new power supply built by Jay Newirth has been installed. Any thoughts would be much appreciated.

 

[Patrick.B (TTR)]

well if your replaced the PSU with a new modern version it's obviously not the issue. then the issues are pointing at the video board, next, likely a capacitor. time to pull it out and replace them

 

[John(Wales-UK)]

Many thanks.

 

[ngtwolf]

Sometimes it's worth reflowing the solder on the solder joints, especially where there are connectors to the board.

 

[mykrowyre]

Hi

My Model 4 has developed a fault where the screen grow and shrink very slightly, much like the old power supply / disk access issue. However, the disks are not spinning and a new power supply built by Jay Newirth has been installed. Any thoughts would be much appreciated.

I had this problem with both of my model 4's, and found that it was just simply a poor connection to the video board due to cracked solder joints at the pins.

Simply reflowing the pins fixed the problem.

 

[John(Wales-UK)]

Thanks all. I'll try that today and inspect the caps at the same time.

 

[lafos]

I had that issue and it was actually dust bunnies inside the case draining the video high voltage intermittently