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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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36" TVs, clicking sound at power-up, no picture
My 7 year old 36" RCA TV stopped working about 3 weeks ago. I'd try
turning it on, I'd hear 3-6 clicks that sounded like the relay clicks during power-on, and then it would stop with nothing happening. I've been too busy to troubleshoot it so far, but that was my plan. An old neighbor of mine called about his 5 year old Sony 36" WEGA doing the same thing, right down to the click count. I thought I better ask on here if this is a semi-common problem before tackling it blindly, since I'm merely a wanna-be tech and not a full-fledged TV repair person. Any advice would be appreciated, thanks. |
#2
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The clicking is an indication that the power supply is trying
to start up and detects a fault. The number of clicks is usually dependent on how many attempts it makes to turn on before quitting, and not an indication of where the problem lies. The trouble might be in the power supply itself, or one of the circuits it feeds. Skew wrote: My 7 year old 36" RCA TV stopped working about 3 weeks ago. I'd try turning it on, I'd hear 3-6 clicks that sounded like the relay clicks during power-on, and then it would stop with nothing happening. I've been too busy to troubleshoot it so far, but that was my plan. An old neighbor of mine called about his 5 year old Sony 36" WEGA doing the same thing, right down to the click count. I thought I better ask on here if this is a semi-common problem before tackling it blindly, since I'm merely a wanna-be tech and not a full-fledged TV repair person. Any advice would be appreciated, thanks. |
#3
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Thanks Mike... a couple other things I should've mentioned...
- no sound (it really appears that the TV didn't turn on, rather than just the tube) - There is electrostatic charge on the screens, so that if I'm lucky that means the high-voltage supply is ok |
#4
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On 22 Aug 2005 10:22:33 -0700, "Skew" wrote:
My 7 year old 36" RCA TV stopped working about 3 weeks ago. I'd try turning it on, I'd hear 3-6 clicks that sounded like the relay clicks during power-on, and then it would stop with nothing happening. I've been too busy to troubleshoot it so far, but that was my plan. An old neighbor of mine called about his 5 year old Sony 36" WEGA doing the same thing, right down to the click count. I thought I better ask on here if this is a semi-common problem before tackling it blindly, since I'm merely a wanna-be tech and not a full-fledged TV repair person. Any advice would be appreciated, thanks. For the RCA, if it'll come on in Service Mode, it may mean that you have an I2C (communication and control) bus problem. I don't recall how to do it; it's a combination of 2 or 3 front panel controls. Don't do anything but determine if it'll come on, as, without knowledge and experience, you can really mess things up in Service Mode. Tom |
#5
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I found the service mode sequnce
(http://www.artofhacking.com/files/TVMODES.TXT for those of you reading this thread), it didn't come on, at least not visibly. The TV seemed off, but it's hard to tell for sure at this point. |
#6
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Very likely the flyback transformer! Rono.Very
likely! "Skew" wrote in message oups.com... My 7 year old 36" RCA TV stopped working about 3 weeks ago. I'd try turning it on, I'd hear 3-6 clicks that sounded like the relay clicks during power-on, and then it would stop with nothing happening. I've been too busy to troubleshoot it so far, but that was my plan. An old neighbor of mine called about his 5 year old Sony 36" WEGA doing the same thing, right down to the click count. I thought I better ask on here if this is a semi-common problem before tackling it blindly, since I'm merely a wanna-be tech and not a full-fledged TV repair person. Any advice would be appreciated, thanks. |
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