On sat and weeks before that the set kept turning off screen black blue light illuminated did this 35 times+ I wait 20 seconds to turn back on with remote and it turns off again in 7-10 minutes, I turn it on 10 times or more till it stays on. I removed the metal cage around power supply ran the set today took meter readings I get 12.28vdc top left connector stby 5.04vdc, 0.46 psnd, other connector 18.52vdc and on the last connector on the left side 120v connector I get 264v ac. Set did not turn off at all today with metal cage removed. What could be going bad on the board none of the caps are leaking or bulging backlight is set to 30. Could it be the the power supply causing this problem.
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Last edited by electro1; 09-08-2013, 02:57 AM. -
Re: Westinghouse lvm-37w1 turns off more then once
You need to find a service manual and see voltage the 18V should be. Most sets use 24V for the iniverters. -
Re: Westinghouse lvm-37w1 turns off more then once
The voltages are printed on the connectors of the delta power supply board. Today the tv turned off yesterday it worked great.Comment
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Re: Westinghouse lvm-37w1 turns off more then once
Ok It's reading on the top connector 12.28v 12volts printed on board 5.04vsb 5v printed on board 4th connector is reading 18.52v last connector 264v update these readings are yesterday's printed on board is 120v 3 pins I get 264 tv on properly when it shuts off by itself im reading .90 on the 5v supply pin and 5.04 on the vsb turn off set turn on I get 5.04 on both pvsb and where it's printed 5v on board it turned off a cupple of times tonight.Comment
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Re: Westinghouse lvm-37w1 turns off more then once
I don't know if you have already fixed yours, but...
I was able to fix my old Westy by simply resoldering the 2 square caps that are located right next to each other towards the bottom of the power supply board. Sorry, already reassembled it, so I don't have component numbers.
Upon close inspection, you could see where the solder joints failed.
I can't take credit for the troubleshooting. There's an instructable I saw, and it was exactly my problem too.
Maybe I'll get another 8yrs out of it.Comment
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Re: Westinghouse lvm-37w1 turns off more then once
Yep, that is the common failure in this power supply board:
http://s807.photobucket.com/user/bud...ml?sort=3&o=46Attached FilesLast edited by budm; 09-18-2013, 10:39 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse lvm-37w1 turns off more then once
I got this TV, Westinghouse LVM-37w1 and the power board was failing. The capacitor did have a broken solder joint but I fixed that and it still did not work. I manually started the board by grounding the PS-ON and it jumps up to 12v and drops right back down. Every time I reconnect the PS-ON it does the same thing but the PS board will not stay on. So I decided to remove the 2 capacitors where the solder joint is known to break. .22uf and sure enough, one of them was bad. So I did not have the same type of capacitor so I replaced it with a .22uf polyester capacitor and it worked.
Does anyone think this is good or should I order a new one?
Then I turned it on and there was no sound. I was about to take it apart when I realized there was no internal speakers so I got some speakers and now it works perfect.Attached FilesComment
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Re: Westinghouse lvm-37w1 turns off more then once
Polyester capacitors are fine for that application. Good job.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: Westinghouse lvm-37w1 turns off more then once
Can I see the printing on that bad cap?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable to reset the computer. I disconnect the battery fully and then reconnect it and it won't turn back on. After letting it sit for a day I plug the battery back up, and the MagSafe 3 cable and it powers on and stays ons, once I plug in a USB C cable into the port closes to the MagSafe port it turns off and the Amber light turns off and won't turn on. No water damage, nothing, I want to do a DFU restore to wipe the computer since the customer stated they did an update and ever since it just decided to not work...
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Hello,
I got this TV (Westinghouse DWM40F1G1) that did not came on one day, blinked for a split second and turned off. I looked at it closer with flashlight and figured that the TV actually works, its just the backlight that does not.
There is one PCB board - all of the components are on it: TP.MS3393.P85
I took my oscilloscope and looked what is coming to the MOSFET that is switching current to LEDs - I could see that the PWM signal comes in but it cuts off almost instantly. I thought its the driver chip OB3350CP and so I replaced it.
After that the... -
I am testing an old LG L192WS-BN monitor I have that gives an image, but has a backlight issue. When you turn it on the backlight turns on 1 second and it turns off, turns on again, 1 second and it turns off and stays off. Using a flashlight I can see there's still an image.
I replaced a bulged cap on the main board, but made no difference. I also got another exact same model monitor that has a broken ccfl (the connector got ripped from the panel and the main screen connector is also broken so I can't use this panel to test), tried using the main board from this one, same issue.... -
Hi.
I kindly ask you to help me solve the problem.
Dell Precision 5510, motherboard AAM00 LA-C361P Rev:2.0
The board turns on, there is no image.
Read more. When the power supply is connected, the front panel indicators light up briefly.
When you press the power button, the button indicator lights up. The board works
there is no image, there is no matrix initialization, there is no image on HDMI.
When turned on, the fans do not spin, but when they warm up they start spinning.
When you turn off the button, the fans spin up to full speed for a short... -
good morning, I have a samsung UE55F8000SZ tv that turns on, shows the logo and turns off after 1-2 seconds.
This defect happens continuously, hearing the classic click of the relay every time.
Power supply board BN44-00636B
disconnecting the mains and lamps from the power board always causes the same problem.
Is it normal that without anything connected this power supply turns on and off cyclically?
any suggestions on what to check?
thanks in advance
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