Question about Envision H22W 22" Monitor

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Never turns on, power light flashes fast

I have already replaced the caps, and even replaced the video board, still has fast flashing power light an other functions.

Posted by Anonymous on

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The flourescent lamps on the sides of the LCD panel is burnt out. If you open the monitor and look at them, I will bed they will be blackend on one end. This is common and you need to find some new ones to replace. They are usually about $15 and plug into the HV little board that drives them. Hope that helps!

Posted on Apr 10, 2015

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Posted on Jan 02, 2017

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Mitsubishi ws 65513


Yes, 1000UF 25v would be fine. just replace all capacitors in DM Board.
Need further help, let me know.
Regards,

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Powers on, phillips screen displays and then shuts off


Its a Fail safe. Have you checked for blown caps on the PSB-power supply board.

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My hitachi P50H401 will not turn on. No sound no


check your sdr boards. you can test them with a multi meter. they are known for going bad. what happens is the two caps by the output go bad on the power supply and they make the sdr boards burn out. you can replace the two caps and save lots of money. then please check out this web page http://www.hometheatershack.com/forums/hitachi/38229-hitachi-p50h401-led-flashes-3-times.html

This web page has info about repairing these. The 4 flashing lights maybe the x sus or the y sus but it's still a good idea to check the sdr boards since its a common failer. I had one tv with a bad sdr board flash 3 time and another set it was flashing 4 times.

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I turned on the TV but just got a black screen but could hear audio just fine. Turned the set off and unplugged it. When I plugged it back in the green timer light started flashing and would not stop...


Nonstop blinking is likely a DM or format board - format board most likely. I have rebuilt several of these by simply replacing all the caps, about 70 of them, and takes about two hours start to finish... But this set does need to boot. It takes about 70 seconds of flashing green light before you're able to press the power button - even when everthing is working as it should..
Hope this helps!

Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

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LT 30 HV Olevia Syntax No picture - blue flash


Ur video converter board is dead.
Need to be change.

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Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

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1 Answer

I have a 50in philips plasma tv it will not turn on it flashes 6 slow red lights and 3 fast red lights .I have unpluged it to reset it and it does the same thing .


Hi .

Replace all the electrilitic caps in the power supply.
To nconfirm this grab your hairdryer and blow hot air on the power supply board.
What this does is heats the electolytics and makes them come good.
This step is to confirm the problem.

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1 Answer

Sony KP-51WS500 will not turn on


I believe the problem is either in the G board ( power supply) or the D Board ( high voltage) as the 3 blinks indicate the G board, and 7 indicates the D board and 6 indicates the +5 line a and b boards. So with that many codes its most likely the G board (power supply) You can get a new replacement G board at the following link which comes with free tech support to help you plug the baord in which is very easy. Its listed under the Sony parts category and its the A-1316-566-A sony G board, Here is the link.
http://servicemanuals.vstore.ca/

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Is it the CPU or a Motherboard issue?


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