My 1998 Sony Trinitron KV-27S45 has worked flawlessly for years, and has been in the same place since I brought it home from the store. I usually use this as my alarm clock, because it's so reliable. Today, it just clicked - and no picture or sound. Everytime I try to turn it on - remote or manually - it clicks like it WANTS to turn on, but my little red light on the front just keeps flashing four times, and repeats. Does anyone have a manual that might decode this flashing signal from my TV?
Buy a new TV, because it's not worth fixing. Q502 replaced with no change for me, and board replacement on a TV this old just didn't make any sense vs cost of a new SDTV to replace it.
Posted on Aug 26, 2008
Ok Gentleman here is your solution for this problemo. 1-buy the service manual with schematic drawings from Sony or any other dealer price $12 usa. 2- Go to the page 35 and you will look a device transistor whose ID is Q502, this tnt is installed in a HEAT SINK PLATE IN C SHAPE. 3- WITH DigitalMultiMeter CHECK THE RESISTANCE BETWEEN Base TO Collector (B-C) and Base to Emitter (B-E) the values measured should be in the range of 5 to 10 Ohms.tha is OK. 4- reverse the polarity of the DMM and the values measured will be in the range of 0 ohms. that is ok. 5- in the event of checking the ohms values between reversed polarity item 3)the values is quite similar in the range of 5 to 10 ohms , the transistor Q502=C5426 MUST REPLACED. 6- THIS Q502 IS THE HORIZONTAL OUTPUT TO DELIVERED TO THE HV TRANSFORMER. GOOD LUCK IN YOUR ENDEAVOR. TV SET GUY
Posted on Jun 27, 2007
4 blinks indicates the vertical deflection has stopped. i would suspect the vertal ic has gone bad. if ic is good check the +13v this is supplied by the "A" board but it powers the ic. if i remember right the vertial o/p ic has the board marked as ic541. good luck
Posted on Nov 29, 2006
According to the manual... Problem: 'a red light keeps flashing on the tv for more than a few seconds', What it could be: 'your tv may need service', What you can do: 'Call your local Sony Service center'
Posted on Nov 29, 2006
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I have this same problem, but there is no way I have the skills necessary to fix it myself. Does anyone know how much this would cost to have repaired by a professional? Hopefully it's not too much, I really don't feel like buying a new TV at this point.
Sounds just like mine the same set and has worked fine till last night just shut off and does not want to come back on.?
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