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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Sony KV32XBR400 doesn't turn on
Hi,
Has anyone experienced this problem? The set was made in July 2000. When I try to turn it on, the standby light blinks several times, I hear a few clicks, but I get no sound or picture. I can tell that the high voltagte does not come on. I had it repaired and it worked for 8 days and then went back to this. Then I discovered that if I unplugged the set overnight, it would come on the next day; but if I turned it off then it would fail again. Now it won't come on at all. Ayn help would be appreciated, Thanks |
#2
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If you had it recently repaired, you should call the people who serviced it!
It is common that if the original Sony factory parts are not used, the set may fail again. If the service tech did not properly locate the original cause of the failure the set will fail again. There are many issues with this model series that can lead to it failing again very shortly after it has been serviced. This type of repair is something that I doubt a non experienced tech would be able to properly service. -- Jerry G. ========================== "jim" wrote in message news.com... Hi, Has anyone experienced this problem? The set was made in July 2000. When I try to turn it on, the standby light blinks several times, I hear a few clicks, but I get no sound or picture. I can tell that the high voltagte does not come on. I had it repaired and it worked for 8 days and then went back to this. Then I discovered that if I unplugged the set overnight, it would come on the next day; but if I turned it off then it would fail again. Now it won't come on at all. Ayn help would be appreciated, Thanks |
#3
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jim wrote: Hi, Has anyone experienced this problem? The set was made in July 2000. When I try to turn it on, the standby light blinks several times, I hear a few clicks, but I get no sound or picture. I can tell that the high voltagte does not come on. I had it repaired and it worked for 8 days and then went back to this. Then I discovered that if I unplugged the set overnight, it would come on the next day; but if I turned it off then it would fail again. Now it won't come on at all. I had just the opposite problem. 3 years ago on my Sony 36xbr250 I discovered that if I had the set unplugged for a while, when it was plugged back in it would turn on immediately. If you turned it off, a second later it would come back on. The set had to be left on for an hour or so before the standby circuitry was stable enough to keep the set off when it was turned on. Now 3 or 4 months ago it started randomly turning on in the middle of the night or whenever maybe 3 times a week. Since I had a 5 year extended warranty with about 9 months left on it from Circuit city I called them. To make a long story short, the tech sent out determined that the main processor board need to be replaced (per Sony's directive). Made sense to me since I have a schematic and the main trigger for the relays comes directly from the processor chip. They initially thought it was the power relays since they have had some history of them going bad and "sticking" in one position. However, since the re-power-up was being delayed, Sony claimed that it was the processor board. Sony spent over two months trying to find a replacement board for me and couldn't (while my set sat on the front room floor). CC finally granted me an exchange on a new 36 inch set with a new 5 year in home warranty that seems really fair (essentially they have given me it all at their cost equivalent to what I paid for my set nearly 4.5 years ago-around $1800). If I hadn't had that warranty I'd be up the creek since Sony can't find the parts (and that was a popular set too!). I'm not sure that this is of much help other than if you do have a schematic for the xbr400, you could put a meter on the processor output drive for the power switching an see if it looks healthy or not. If it is, you might be lucky and it could be one of the "sticky relays" that I've hear about. - Jeff |
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