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Power on problem.

When powering on the LED gose from amber to red and no further. The power supply has been repaired and outputs +24 vdc and +12 vdc.

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Re: Power on problem.

What do you mean the power supply has been repaired and outputs 24 vdc and 12 vdc?

Posted on Jan 15, 2008

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Tv will not power up

Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and precious time.

Aug 26, 2014 | Flat Panel Televisions

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Relay clicks when applying power. Yellow light comes on. TV is dead otherwise. Power supply is outputting +5, 12, and 24 volts Mainboard (3647-0282-0150) has +5 and 12 volts always applied. Checked...

Amber light on means standby voltage is high. IF amber light does not go white when power button is pushed the its one of two things.
A. No power on command from main board. Usually labeled PS-On. Should go high from 3.3v or maybe 5volts. If not present Main is defective.

B. If the ps-on line is going high then your problem is a defective power supply.

Oct 15, 2013 | Vizio XVT472SV 47 in. HD-Ready LCD TV

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ViewSonic N3250W Television with FSP212-3F01.dead needs VOODOO

I am working on the same power supply right now, my has a bunch of bad caps that I already replaced but I did not try to turn it on yet becuase I see that RS1 and RS8 are missing, some one had try to fix this power supply. Can you please tell me the value of these two resistors? Please see my pictures at
Your problem sound like the logic board problem, I can tell you what you should have if I can find out if these two resistors were left out from the factory or some had removed them. I fixed the same power supply for the N2652 but I did not take the pictures of the board, I wish I did.3a99fcd.jpg

Jun 17, 2010 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

I have a ViewSonic N3250W Television with FSP212-3F01 power supply. The power supply looks OK no visible caps problems no burn signs. I get the 5 Volts output OK but not the 12 Volts or 24 volts. The red...

Does the LED kick on when you push the power button or when you apply power? Typically, the 5volts will run the microprocessor and that looks for a command (power button). When it sees a command, it will send a signal to the power supply to kick that on.. so at this point, you want to look for that signal. If you push power and no power on (p_on) signal goes to the supply, its likely your main board.. but if it does, and the supply doesn't react, then maybe its the power supply. I am not totally familiar with this tv, but thats how all of them really work. Even if the caps look good, some could be bad.. look for brands like "capXon, sanXon" are typically the defective ones, theres another but its slipping my mind.. usually 1000uf @ 16v are bad, or 2200uf @ 10v are also common.. you can search the value and the little code, usually like C9M or something and see if that batch has known issues..
let me know what you find, or how I can help

Jun 15, 2010 | Flat Panel Televisions

2 Answers

42" Vizio Power supply board output voltage?

The next thing I would check out is the power supply for the screen. Most manufactures call it a Backlight Inverter Board. If a part does go bad on this board, it would also cause the stand by mode or protection mode.

Jul 30, 2009 | Vizio L32 32 in. LCD HDTV

2 Answers

Same problem. red light flashes 3 times, but will not turn on.


The blinking light means the controller QA01 in the AV_TERM system board is booting and driving the TIMER/REC RED LED light accordingly. This failure mode is true for many conditions, not exclusively for the main PS board PE0071. It could be caused by many things, LOW B, SEINE, AV_TERM, LCD, PROTECT, etc.

Specifically for PE0071+12VDC circuit failure, which is the most common , listen for the LINE relays SR80, SR81 coming online. If several (3) or more clicks are present when applying power to the TV set then suspect the +12, 20, +32 VDC inverter is faulty.

As a quick check, you can disconnect P807B. If the relays cycle every 1-2 seconds then is most definitely the +12VDC inverter. Check for voltage level at optocoupler Q881 pin 4 and this should not be cycling. This point is the VCC for the oscillator. Repair or replace board 75002913 as necessary.

TROUBLESHOOTING: (this is my own, not the OEM !, try at your own risk!)

  1. Check for LINE1 input voltage level at inverter on sheet [4].
  2. Check for LINE2 input voltage level at inverter on sheet [3].
  3. Check for STBY +5VDC & +25 VDC ( observe correct GND REF) page [4]of PE0071 POWER
  4. Check for +22 VDC out of regulator on page [3] out of Q822 Emitter
  5. Check P809B connector for :
  • P809B (12) POWER = 3.00 VDC (+/-0.2)
  • P809B (11) POWER_SIG = 0.00 VDC (HIGH to Power on TV)
  • P809B (10) PROTECT = 0.00 VDC
  • P809B (9) ACDETECT = 3.00 VDC (+/-0.2)
  1. Check for PFC_OUT = 368-371 VDC
  2. Check for +12, +20 & +32 VDC inverter page [5] of schematic manual.

For +12 VDC Inverter, suspect components:

Q880 STR-W6765 PSR (works really hot!!)
D884A and related switching circuit components.

Good luck,


Jul 03, 2009 | Toshiba 42HL196 42 in. LCD HDTV

1 Answer

LCD tv issue

at error code is 12 and it is your 12-volt supply. Measure from the inverter to the power supply for 24 volts pins 1,2 and 3. If you don't have the 24 volts disconnect the inverters from the power supply and see if the volts come up. If the 24 volts come up replace the inverters. If the 24 volts are still not there replace the power supply. The volts have to be steady and not going up and down if they are replace the power supply.
But if the 24 volts are there with the inverters connected 1M03 pin 3 for 3.2 volts. If the 3.2 volts are not there replace the small signal board. The only way to get a manual is to find it on line or call the manufacture.

Aug 26, 2008 | Philips 37PF7320A 37 in. HD-Ready LCD...

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Vizio P42HDTV Power on Diagnosis

Relays are the first big clue, triggered by the 5 & 12v supply you should be able to trace back using a dmm and see if you have both of those voltages present... The lead coming from the smps to the y-sus board is a good start. On a Vizio I believe the voltages are listed per pin right on the board...
If you had any kind of relay sound then you could suspect the y-sustain or z-sustain board or something else. With the relays being silent I'd strongly suspect the power supply.

Apr 06, 2008 | Vizio P2 42 in. HD-Ready Plasma Television

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