Question about Pioneer PRO-99 TV

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Pioneer pro99 standby problem

I recieved this tv with a standby problem when powered on it starts to come on you can hear high voltage start then it will go from a green light  right to the red. I've hit all of the solder connections but same thing. Could you tell me where to start? Thanks

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  • davecorey1 Oct 22, 2008

    Same Story - out of the blue. The set will not turn on. It attempts to, and the red light briefly goes to green, but then back to red, and no start up.

  • Anonymous Feb 15, 2009

    I have the same problem,after I try to turn in on about 15 to 20 times it will come on. It seems that it comes on after it warms up. If iI accidently turn if off it comes back on right away. For now I have been leaving it on and just turning off the dish reciver , but I am afraid that the bulbs will burn out a lot faster if I do not turn it off when not watching it.

  • Anonymous Apr 19, 2009

    Same problem here

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4 Suggested Answers

  • 68 Answers

SOURCE: Pioneer SD-P6091K problem with turning it on

Is this set several years old, and has it been good till now? There is one on the internet, 8 years old for sale with the same symptoms as your friends. There is an internet site `tv-forums.com. Presumably you have already looked with the back off. Make sure there is not a build up of dust, which will cause overheating. If it has a 150 watt UHP lamp, or similar,(expensive!) it may need replacing. The lamp must be cooled by a fan, so make sure this is srill working. There should be a thermal cutout which automatically resets.

Posted on Oct 25, 2006

  • 1153 Answers

SOURCE: Pioneer SD-62A5 has red standby light, won't turn on

Check C258 video assy.

Posted on Aug 16, 2007

MrBob84
  • 90 Answers

SOURCE: pioneer 710 hd power/not turning on 10/12/08

When the set goes into protection BANG like that, without any intermittencies, usually the convergence ICs have gone out and need replacing. I recommend using the STK 392-180s, which are the stronger upgrade to the 392-110s used originally. You'll need 2.


Mr Bob
www.imageperfection.com
510-278-4247
bob at imageperfection dot com

Posted on Nov 12, 2008

tducksoup1
  • 7 Answers

SOURCE: Pioneer SD-532HD5 Projection Screen TV won't turn back on.

the problem with pioneer projection tvs is that when they made the boards they never used enough solder for the circuits and you get cracks in the runs. thats why heat and cold will effect it. I had the same problem and I took out the board and resoldered every track I could and it works good now but my remote wont work if anyone has any info or prints to this tv please post on here

Posted on Sep 15, 2010

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I have a pioneer Pro 200 and have had it for a dozen years. I have an HD in my office and the picture is so good and bright on the Pioneer I just cannot bring myself to get rid of it. The TV blinks off...


Im going to guess that if you try turning it on, sometimes you hear a "click" and nothing then the problem persists over and over until it finally turns on? If so, it's a problem with the power that "jumpstarts" the screen. Worn out capacitors on older models don't hold the necessary charge it takes to "start" the inverter that powers the screen. Once those start to go, it's usually bye bye for the tv. That is IF this is your problem. Let me know. Sometimes it makes hissing or cracking noises along with it. hope this helps!

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The screen is blank with no raster at all. There are indications that the channel numbers are changing in the display. This indicates that some of the low voltages are present but these may be derived from the standby supply.
Assuming there is no deflection and no High Voltage, you either have a low voltage power supply problem, bad start up circuit, or bad horizontal output transistor (HOT) or other bad parts in the horizontal deflection.

Check for bad fuses.

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Use an ohmmeter to test the HOT for shorts. If it is bad, look for open fusable resistors or other fuses you did not catch.
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Test the transistors if it is that type with an ohmmeter. If one is shorted, you have a problem. The usual way a TV service person would test for start up problems is to inject a signal to the base of the HOT of about 15.75 kHz. If the TV then starts and runs once this signal is removed, the diagnosis is confirmed. This is risky - you can blow things up if not careful (including yourself).

If you hear the high pitched whine of the deflection and/or feel some static on the scree, confirm that the horizontal deflection and high voltage are working by adjusting the SCREEN control (probably on the flyback). If you can get a raster then your problem is probably in the video or chroma circuits, not the deflection or high voltage.

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