Question about Pioneer SD-P5795W 57" Rear Projection Television

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Need help i have a sd-p5795w tv and it wont turn on first it shut off every once in a awhile now wont turn on someone said the power supply what does the power supply look like so i can fix it

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Re: need help

A power supply is a very complex circuit that changes the voltage that comes from an outlet to voltages the tv can use and is a circuit that need to be repaired because in Tv's is only a section of a circuit board and the rest of the board has other functions. Computers use a single module that you can replace as a whole but not tv's.Be safe an call a qualified technician because there is danger involved.Get an estimate.

Posted on Sep 18, 2006

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My Poineer SD-P5795W television is 11 years old and has been in STANDBY (red light) mode most of that time. Recently when I turn it on it will only stay in ON (green light) mode for near 2 seconds and then...

Hello there,
When your television refuses to turn on and all you have is the standby light or the green light turning on and then going off in few seconds, that is a sign that there is a problem inside of the unit.
When the television gives off signs as this,it could be as a result of one or more factors going bad inside the unit of the television.
The factors that could cause the problem is eithere there is a bad capacitor on the main board or the power control board(PCB). Or the lamp is bad. It could be one of the two facotrs or both, therefore, this will result in you running a check on these factors.
To test and replace the bad capacitor, you will be in need of a screw driver, soldering iron, desoldering braid, soldering wire and replacement capacitors. Unplug the television, turn to the back, unscrew the screws that hold the back cover off the television, then you lift up the power control board and assess it for any capacitors that looks shrinked, swollen or burnt out. Once it is detected, trace it to the back of the board, then you desolder it off the board, get exctly that type of capacitor and fix into the board and solder it back on using the soldering iron and soldering wire. Please be very careful about it, in order for you not to create a bridge.
Do the same for the main board of the television, the main board is usually clipped onto the frame of the television.
For the lamp, you will have to reach out for your user manual, as am not keen with the location of where the lamp of your model is located, but once you locate it, have it checked and replaced with a new one.
That should solve the problem for you. If you are not familiar with such technical/electrical fix, i will suggest you get someone who is familiar with such to handle the fix, because televisions are well known to store current over time.
All the best Elect_Comp

Sep 21, 2011 | Pioneer SD-P5795W 57" Rear Projection...

2 Answers

My hitachi 46f500 tv wont stay turned on. you turn it on the red light comes on and then you here it click once then shuts off. It has done this in the past, then for no reason it will start working again.

This model like most of these sets uses up to 3 mechanical relays; they are black and square (follow power cord into set) and have a history of either opening or not when in use---I have seen several where it would not shut off or turn on etc where you could tap on the relay and the set would work..
The only other reason would be a bad solder connection in the same area---tap and the set works and it is either the relay or a bad solder connection.

The click is the relay shutting off and points to where your problem is.

If you have questions comment here and I will help.


May 28, 2011 | Hitachi 46F500 46" Rear Projection...

1 Answer

The picture gets shakie,then it just turns off,sometime you can get it to come back on right away,other times it takes awhile.

the problem on this tv is a lot of loose connection on the power supply board , u need to solder all the componect on the power supply board and sould be ok , or u can hire a tv tech and do this job for u normal repair is about $250

Dec 01, 2010 | Pioneer SD-P62A3-K 62" Rear Projection...

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The tv shuts off by itself. I will turn it on..and after awhile, it just turns off by itself, and then after about a minute I can turn it on again and watch tv for awhile, and then it will do it again.

It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur. The faulty component(s) are heating up, tripping the fault control, and shutting down, it cools down again,and will restart, then the process repeats, it will eventually fail fully.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

Mar 04, 2010 | Projection Televisions

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I replaced the lamp bulbs and the TV worked fine for awhile but shut off after about three days of use. I unplugged it and waited awhile to plug it back in the timer light blinked for awhile and then went...

While it is suspicious happening so soon after lamp replacement, your main power supply may have failed. In earlier sets, these were problems that eventually happened.

Feb 15, 2010 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Power Supply part problem with a SD-P5795W

I wouldn't trust anything this repairman said reason well for one thing how could he (or anyone) tell everything else is "in perfect condition" when he couldn't "see" anything to tell what it looked like. He might be right about the power supply being bad But it could also be the high voltage "power supply" could have a short and that would cause the symptions you describe
But if you want to try the power supply your self you can call Pioneer and give them the model number and they should be able to get the information you need.

Dec 24, 2008 | Pioneer SD-P5795W 57" Rear Projection...

1 Answer

Tv runs through vcr only. What can we do? Also need a manual. Where can we find one?

try to resolder the tuner first and see if that makes a difference , otherwise you may need to replace the tuner
does video inputs work ok?

Nov 07, 2008 | Pioneer SD-P5795W 57" Rear Projection...

1 Answer


yeah, I have the same issue... The tv worked fine, and now it will not turn on... the light turns green, then turns off and goes red...

Aug 03, 2008 | Pioneer SD-P5795W 57" Rear Projection...

4 Answers

50" Projection TV

your set was going into protective shutdown. Probaly a leaky diode that was raising voltage that triggered the shutdown circuitry.Toshiba has good service info available to trubleshoot the power supply and shutdown circuitry. let me know if you would like me to post a link on where you can get this troubleshooter manual .

Feb 24, 2008 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer


Hi tedski have a tech look at your tv the problem is in the power supply or related circuit.good luck

Apr 26, 2007 | Pioneer SD-P50A3-K TV

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