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Troubleshooting No Display on HL-T5075S

2K views 5 replies 2 participants last post by  fiberglasscivic 
The discoloration is not necessarily a problem. I think the DMD board is a good guess but it could still be a bad digital board or power supply. I don't know of a good way to troubleshoot these further than you have, but it has been about 4 years since I was repairing sets like this.

I would check the supplies from the power supply to see if there are any obvious issues, and look for swollen caps.
 
It looks like the board has been reworked to me. Cap failures on Samsungs are prety common so I would not be surprised. Look for any swollen caps or if you have an ESR meter test them.
 
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