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Message body Emoticons View more Emoticons	Font colour: Default Dark Red Red Orange Brown Yellow Green Olive Cyan Blue Dark Blue Indigo Violet White Black  Font size: Tiny Small Normal Large Huge Close Tags [quote="larserik1"]Hi I'm Lars I'm trying to fix an old surround sound unit I have here. It was fixed multiple times under warranty until it ran out. I have pretty limited knowledge on electronics so if you have the time to help you may need to explain things slowly for me. The unit was starting then shutting down and saying protect, this was with no speakers plugged in. I removed the cover and through some trial and error found that if I disconnected the AMP pcb it would start and run a disc ect. I then found on the main power board that # R91 a 1/4w 1k resistor was burnt, also found that a diode #D31 was blown in 2 pieces and 3 capacitors were also swollen on top C92 C93 and C94. Now I replaced all these parts with new ones, It then didnt start at all just a flickering standby light which I think I read somewhere was a short circuit? Now if leave the AMP pcb plugged in and I cut the #D31 diode back out it would start again say protect and shut down. If I disconnect the AMP pcb completely again (with the #d31 diode still not in there) it will start and run a dvd and can watch it on tv just no sound obviously. Its not essential that I fix it just thought it would be fun and could save some dollars trying to do it. Thanks in advance.[/quote]
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