Question about Sharp Televison & Video
Will not turn on. blinking yellow light, dark screen, no back light. There is a standby voltage of 5 volts coming from the power supply.
Ur power board have dead parts,Check parts like Capacitors puff up or burst open.Know how to solder?Or replaced the the whole power board,Websites Shopjimmy.com,Ebay.com have reburbish power board.
Posted on Jan 13, 2010
the s1 models have been having several problems. it really depends on how many times the red led is blinking. panasonic uses a certain number of blinks to tell you what board has failed. the s1 models have just recently come out. therefore your tv should still be under manufacturer warranty. call panasonic and see if there is a servicer in your area. our company is in dallas texas. Aces Tv Service.
Posted on Mar 04, 2010
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if you are certain the power supply is good(try it in another machine) and its completely connected it sounds as if your motherboard is going bad, there is a 5-volt supply in your power supply that does not turn off when the system shuts down, its called 5-volt standby, this runs some small circuits on the motherboard that monitor the power switch, when its pressed the circuit starts up the whole power supply. thats how we can power off the system with software. usually its a custom chip and some components, but without the schematics of the motherboard and the replacement parts and the ability to de-solder and solder on a multi layer board its not usually repairable by the end user.
the system memory and processor are not even used in this part of the system startup, they come into play after the supply is up and stable and supplies the power good line to the motherboard.
make sure the supply is good, and all connections are making contact, that none of the pins have backed out of their housings when being plugged in and that there are no cracks in the solder joints where the power connectors attach to the motherboard.
Oct 17, 2007 | Computers & Internet
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