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E116921 power not work

Elkot+q7+zd4 changed> +5v ok, +12v and +24v no!

Posted by Anonymous on

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Polaroid " 3211 TLXB red light no power

hi remove the supply to the main board & inverter, now power your psu if give you this same above voltages , go for new power supply unit. change your power

Posted on Oct 12, 2008

  • 267 Answers

SOURCE: No power to viewsonic N3252W lcd


Posted on Apr 10, 2009

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The 5 volts is the standby voltage that should always be present, the other voltages should be there when you try to turn the LCD ON.
If the 5 volts standby are not steady when connected to the main board, Q7 might be defective.
Check all the capacitors in the secondary circuitry for bulging or leaking conditions.

Posted on Aug 28, 2010

  • 11361 Answers

SOURCE: insignia ns-lcd47hd09 i check voltages again solid

It means the feedback circuits for regulating the 12/24vdc is not working, use 12v car bulb (1157) to load down the 12vdc supply and two 1157 is series to load down the 24vdc power supply and see it if still rises up, the stange thing is that you said it rises to 36vdc (12 + 24 = 36), is it being measure correctly?

Failed TV and Monitors:

Capacitors kit: he can make you a set of caps.

Posted on Sep 07, 2010

Testimonial: "great were almost there A+++"

  • 2315 Answers

SOURCE: de antemano un saludo, espero

Aqui te esta la informacion que necesitas:
Q7= 2N2222, o 2N4401 es un NPN transistor
ZD4= 15V 1/2W ZENER

Posted on Dec 04, 2010

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Actually its a printer that gives out 3.3v, 5v, 12v, 24v and 47v. But the 24v and 47v is not coming, any good answer?

If you measures at the power supply module and the voltages are DC then you probably have some bad regulators. Parts are usually not coded so replace the power supply module.

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Hi there, i have a baird lcd model j047baird\r\nthe fault i am having is, it stuck in stby. power supply look fine all voltage is there. if i disconnect the lead j5 from main board to invertor the screen...

there is 2 problems that makes this tv have standby fault.. so here they are,!

1.)main av board ---the 8 leg eeprom loses programing just under LVD CABLE TO SCREEN -£14.99 from a guy or if you can program yourself 4.99 for the flash to reprogram,.

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Jul 31, 2011 | Televison & Video

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The 5 volts is the standby voltage that should always be present, the other voltages should be there when you try to turn the LCD ON.
If the 5 volts standby are not steady when connected to the main board, Q7 might be defective.
Check all the capacitors in the secondary circuitry for bulging or leaking conditions.

Aug 28, 2010 | Protron PLTV3250 32 in. LCD Television

1 Answer

Fuse and power supply look ok to the eye slight static sound on audio tiny flash intermitent inright corner on video, any clues? power diods check good ,nothing looks hot or burnt There is a second board...

Your power supply on the dc output should have the floowing DC voltages, 5v, 12v, and 24v. Just start probing the connectors of the power supply. 24v is needed for the backlights inverter board, 12v for sounds, 5v for logic board.

Dec 09, 2009 | Audiovox FPE3206 32 in. LCD Television

7 Answers

Viewsonic N3250W won't power on

Got the same problem for a N3250. I'm not an electronic engineer and will attempt to fix my TV. Therefore I got the FSP2123F02 ($49.75)and now they have a harness 4WT0062302GP ($8.90) that will do a quick plug and play and will avoid any solder of the pins. That is my understanding can anyone corroborate this procedure. By the way I got both products from
I repaired it on June 28th with the lsit of parts above
More deatil information here (of the problem)

List of photos
A) new Power supply on TV 47afd61.jpg
B) new Power supply and new 12 pin connector (plug and play)
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Jan 15, 2008 | ViewSonic N3250W Television

1 Answer

Signal out of range

Hi, these monitors are dropping like flys and it's due to power supply problems. There is a power supply that needs to supply 5v, 12v, 24v. The 5v and 12v is for the logic boards and the 24v is for the back light. On other boards people have tried to repair the supplies with no luck (same here).
The best fix is to purchase two power bricks off of ebay. Get one that supply 5v 12v that are used forexternal hard drive2_bing.gif enclosures and get one 24v that is used for mac g4 laptops2_bing.gif. Both can be had for < $10. Then you will have to replace the internal power supply with these. This is not for the beginner, but if you have any experience with soldering and wiring you should be able to do it. You will have to tap into the 12,5 volt wires, I used the PC style power 4 pin connections and attached the other end to the power supply. You will also have to do this for the 24 v lines. A bit of cutting / stripping, soldering and getting the AC to both will do the job.
The only thing that this will not do is shut of the 24 v supply during idle. Best this is to remove power from the monitor when not in use. This should fix an no / power / on then off / problems with this monitor.
Total time is probably about 2 hours and tools needed are the replacement power bricks, cutters, soldering iron, solder, electrical tape, screw driver... etc

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