Question about Sharp Aquos LC-15B4U-s 15 in. EDTV-Ready LCD Television
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Posted on Jan 02, 2017
I called Sharp and told them about our problem. At first they denied even knowing about this kind of problem but after some back and forth, they finally gave me a case number and told me to call back on Monday (this was on a Saturday). I did that and at first they didn't want to admit anything there either but again, after some back and forth, they agreed to have the set fixed by a local company (under contract with them I suppose). When the people called to tell us when they were coming we told them that they had told us that they would be there a few days later and the service people said 'yeah, but we got the part in sooner'. So what does that tell you? They do KNOW about this problem - it's just getting them to admit it. The service guy brought some new boards out but they didn't fit so they had to take the set in while they ordered new boards. That took almost 2 weeks but we've got it back now and haven't had any more problems with it. Our set was over 2 years old but I didn't know it at the time - I thought it was just over 1 year old. But we did give them the model and serial number and am happy with the way things turned out. We live in Texas so I don't know how anybody else's problems were handled.
Posted on Feb 17, 2009
SOURCE: LC-37AF3X Sharp Aquos KCD TV
If the TV goes in standby, then it is in protection mode.
Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.
1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.
2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.
If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.
If you want to DIY you find parts here,
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On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem
On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.
On Rear Projection : check lamp, lamp ballast, power board, and convergence.
On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.
Posted on May 05, 2009
Do you get any indicator lights at all, if you do, then the 5v standby circuit is working, if you get nothing at all, then the main power supply will be the first palce to look, blown fuse? capacitors?
Posted on Nov 06, 2009
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