Question about Akai PTH5498 54" Rear Projection HDTV-Ready Television
Currently the TV will not turn on. It tries to turn on then turns off, It continues to make the beeps for turning on, then no picture and it turns off. It keeps trying to turn on, so I unplugged the TV. I thought maybe it would reset. Any help would be greatly appreciated.
Can you add more detail to what's happening? Are there any sound coming from behind the set? Do the lights in your home dim as it is cycling on and off? Is there a squealing from behind/inside the set? Was there any repairs or problems prior to this? I ask these questions because I have the same set, and experienced the same trouble. Eventually the cycling stopped and the set began to come on. Then it would start cycling again. Finally the cycling stopped the set came back on, but now the sound doesn't work. I can only hear the sound using my surround system. I currently have parts on order and I'll keep you posted on the out come. My email is email@example.com for you or anyone else who can shed light on our problem here. If your set is making the squealing sound like a mouse during the cycling process. I believe it is coming from one or both of the large 2200 micro farad capicitors located on the the right power board. They are the largest ones on the board. DO NOT TOUCH THIS AREA UNTIL THE CAPICITORS HAVE BEEN DISCHARGED!!!! THEY CAN KILL!!!! There is also a small black relay clicking on the center convergence board. My problem started about 2 months after I made a repair to the convergence board-swapping out the 2 convergence ICs STK392-040 as well as the blown pico fuses. The convergence seemed to work fine, All color was back to normal after performing the convergence a couple times, but after 2 months this cycling problem started. Any help will be greatly appreciated from anyone. I will keep you posted on my progress.
Posted on Oct 19, 2007
SOURCE: Akaia PTH5498
The STKs are common and if you have an experienced electronics tech
around they can replace them for much less money but the tech must have
advanced soldering and IC exchange experience.
The STK ics, two of them, can be purchased on line for around $20 to $40 each.
Partstore has two models available - one for around $40 and another for around $55.
The part number is STK392-110 and if you google you can find them for as little as $6/each but I don't recommend the cheap ones as they are not reliable.
It takes a good tech around 3 or 3 hours to take the old ones out and solder in the new ones. Also, it is likely one or two resistors are burnt and will need replacing as well.
Posted on Dec 18, 2007
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