Having problems with your Projection Televisions ?

Sanyo DP50747-00 (Samsung Power Board LJ44-00132A) wont turn on ..

\015 Tv started to shut itself off the turn back on. Frequency of events became greater over a month period and eventually it would not turn on at all and the power on light did not come on either.\012\012I replaced 3 bad caps and a questionable one on the power board. \012This solved the problem.. for 2 days. the symptoms started again and this time within 4 days the tv would not power up at all.\012\012I let it sit for a week and had the board out. When I tried it again it stayed on for 12 hours. I figured it was time to hang it back up and as soon as I did, it was back to shutting itself off after 60 seconds. I got about 10 on/off cycles out of it over a few hours and now it will not power up at all (again)\012\012I have rechecked the board and cannot see any visibly damaged CAPs.\012When i hit the power button, i hear a click (like a relay) and a light humm (like a transformer) but it only lasts for a couple of seconds.\012\012When the TV turns itself off, I hear the same click and hum.\012\012I did check all replaceable fuses on power board and sub board.\012\012Volt meter check: \012\012There is a subpower board that the ac from the wall goes into. there is a connector from that board to the power supply board. There is 120v present on the connector pins going to the main power board at all times the TV is plugged into an AC Socket.\012\012There is a 3 pin connector from the power supply board. The pins are marked: Va, Grd, D5V. This is the only connector on the board where i found a pin marked Va.\012-With the TV on I get the following readings: Va pin - 63 V dc, D5V pin - 5V dc\012-When the TV turns itself off the power on the Va pin drops quickly, you can watch the meter display continually changing. after about 30 seconds it gets down to the mV range and continues to drop to about 140 mV. The D5v pin drops to about 10mV\012\012i found 2 connectors with PS-ON pins. with the power off one reads 5.18V and the other 4.75V. Voltage is not fluxuating. Power drops into the mV range on both pins when power is turned on.\012\012The connector reading 5.18V has the following pins:\012DV5, GND, D3V3, D3V3, GND, GND, A12V/AC-DET, PS-ON, GND, 5vsb, THEM-DET.\012\012The pin marked A12V/AC-DET reads about 3V\012\012On the 2 connectors that go to the X and Y sustain boards, there are pins marked: Vs, Grd, & Vg. the voltage on the pins marked Vs that go to the X and Y sustain boars top out at about 1.6V on both connectors with the TV plugged in. When i hit the power button, they jumped to 208V and held. \012\012I'm torn with what to try next:\012I don't have the competency level i would like to when reading electrical schematics. im concerned about my ability to diagnose a more complex repair\012\012I found schematics online for the Sanyo boards but not for the samsung power board.\015

Answers :

While I am afraid i can not say what is wrong with the board if only because I do not know with certainty I hope I can offer two possible solutions to anyone having a similar problem:


Here is an option to buy an already serviced and tested board and then send the old back to receive credit as per the listing:



This option may not always be available as some customers apparently prefer to pay the high price, but NOT return their old board and we eventually run out of boards.
Of course, in all fairness it also needs to be noted that sometimes we can't repair the board being returned (e.g. due to a bad transformer or a bad MCU) so it's not always the customers that cause us to run out of boards.

When we're out of boards, though, we'd probably still be open for a repair service for the board through




Additionally, we may also offer repair on other modules from the same TV, such as the main board, or perhaps DIY repair kits.

To find out, go to www.coppelltvrepair.com and search for the CHASSIS of the TV (for Sanyo models, which tend to have great deal of a difference between different chassi versions).

E.g. search for "P50747-00" and not "DP50747" or you will find a lot of other offerrings not related to your TV.


Finally, a note on the recommendation from Josh Hurst above: I am not a certified Samsung technician and I bet my lunch I know a good deal more than many certified technicians. I dare say that because we do get calls if not daily then at least a few times a week from people from other service centers saying they are licensed technicians and asking us all kinds of questions.

I do not consider myself *better* than them, but I repeat I do happen to know a good deal of things that they do not know.
I would have never known what I know if I was to follow your advice. It may be given witha care to the customer, but it goes a little too far. It is OK to mess with things you are not licensed to mess with. You just have to be aware of it and accepting the risks. No offense meant.

Repair Help & Product Troubleshooting for Projection Televisions
You need a second opinion or clarification ? ask it in the comment box OR you can Ask Your Own Question

Tips for a great answer:

  • Please provide as much detail as possible as this will allow our members to better understand and respond to your Comment
  • If you need clarification, ask it in the comment box
  • It's 100% free, no registration required

Suggested Questions/Answers :

It is recommended you read all this kind of situations

Sanyo DP50747-00 (Samsung Power Board LJ44-00132A) wont turn on ..

While I am afraid i can not say what is wrong with the board if only because I do not know with certainty I hope I can offer two possible solutions to anyone having a similar problem:\015\012 \015\012Here is an option to buy an alrea ... Projection Televisions

I have a samsung ln-t4053h that had a bad caps. I replaced the caps and the tv turned on fine and i put a flashlight to the screen and the screen turns on but the backlight is on 10 and it looks like its not on at all so that leads me to believe the backlight inverter. As I was testing this the power board slipped and touched a metal part in the back of the tv, sparked, and now the tv wont turn on at all. I figure that i shorted out the power board. If I replace the power board will me tv turn o

... Samsung LN-T4053H 40 in. LCD Television

Need Help I have a sanyo DP50747 plasma no power I replaced the fuse on the main board location of blown fuse was F181 and 180 turned ov tv and worked great untill I shut it down at that time I heard

... Sanyo DP50747 50 in. Plasma TV

My Sanyo dp50747-00 just powered of and wont turn back on

... Flat Panel Televisions

I replace my power supply board on samsung ln37c550 tv still wont turn on

... Samsung LN37C550 37 in. TV

My sanyo lcd model ce32ld81-b wont turn on i'v been told its the power board

... Flat Panel Televisions

My samsung tv wont turn on it just clicks i replaced the main power boaRD AND STILL SAME THING

... Samsung SP-R4212 42 in. Plasma EDTV

Sanyo dp50747 TV turned itself on and will not turn on. The green power light located on the front panel lights up and the side panel off/on works but no sound or picture is shown. The front panel green light stays lit. The TV did this again about one month ago but I just turned it back on. Yesterday, it turned itself on and now does not turn on with the sound or picture shown. There is no sounds or odors from the TV. The power outlet works fine and the TV appears to be getting some power

Sounds like a mainboard problem ... Sanyo DP50747 50 in. Plasma TV

I cleaned out my Samsung hl-s6187w and put everything back together and now it doesn't turn on. It makes a beeping noise like fast morse code and keeps cycling the power trying to turn on. The ballast gets about 270v from the power board, but the lamp never comes on. Could it be the ballast or the dmd board causing the problem? I can hear the color wheel spool up, but the beeping isn't consistent to be the color wheel.

Tv projection lamp inside the tv less than 2 years or so?Yes than the tv projection Lamp is good.You have this tv like 3 or 4 years already?The tv colors wheel even have been replace at leat once?No the tv probally require replacing the colors wheel ... Samsung HL-S6187W 61 in. HDTV

Hi, Can anyone recognise or diagnose this problem we are having with our Samsung LA32A450 LCD TV? It wont power up, no power on lights. Switch on side of TV wont turn on. Remote wont power it up. This may be the key ..... My wife tells me that my 3yo was playing with the remote & the buttons on the side of the TV Would there be any strange combination of buttons pressed that could have rendered it useless? Could close proximity remote activation have caused anything?

Hi g_coopster,\015\012Samsung LA32A450 LCD TV wont power up or no power on lights that indicated that no power line.\015\012First of all, check the power line, cable AC cord is it installed properly, change ac cord if necessary. If you ... Samsung LA32A450 32 in. HD-Ready LCD TV

Samsung s5053, will not turn on. clicking noise inside, screen comes on and goes off. No picture. checked voltage on pin 10 get 5 volts connector cn804-1. research on internet seems to point at main power board, but some think its standby power board. I was going to replace the PSPF501A01A board. But don't want to spend $100.00 on wrong board. Any advice will be helpful. Thank-You Ken

Ken, did you ever find out what was wrong with your set and have it repaired?I have the same "clicking" problem when first turn on the TV. First, it took about 30 secs clicking (came from the relay) then came on ok. The wait time gradua ... Samsung HP-S5053 Television

Sanyo DP46849 my Sanyo DP46849 47" television wont stay on or power up all the way just keeps turning its self off and on I've tried unplugging it, changed wall plugs, and even disconnected all cords and wires still wont stay on and wont let me do anything how can I fix the problem with out giving up my left arm for the repair

The power supply is failing ... Sanyo Flat Panel Televisions

Hello, i have a samsung 42' plasma tv model #pn42c450b1d. the tv doesn't want to turn on. i plug it in and you hear a clicking noise se a red power light. also when you press the power button on the tv in the back u see a green light come on for a second on one of the circuit bords( the one under the power board) and simutanously you see a red light come on and and off at the same time on the circiut board with the av, hdmi, inputs. i looked and thier doesn't seem to be any bulging capaciters. a

Hi.As you know the TV is in protect mode because an internal fault has been detected. I think that you already tried leaving power cable disconnected for ten minutes. After connecting back restart the TV with no device attache ... Flat Panel Televisions

Sanyo DP50710 50'' plasma TV turns on power light then turns off/ on on its own. No picture. After checking all fuses and capacitors, we installed rand new power supply board. Still the sa

The set will need to be professionally diagnosed. There could be a # of things causing your problem. Playing the guessing game can get quite expensive. ... Sanyo Flat Panel Televisions

Samsung LN40B540P8FXZA. There is a Black screen when the power is turned on. I replaced 2 circuit boards but still no luck. Should I replace the capacitors in the power supply? The ribbons between the boards? I was given this broken TV and was told if I could fix it I could keep it....any suggestions?

... Flat Panel Televisions

I have a Sanyo DLP 50747. When I turn it on It clicks off in about 10 seconds. I read online to try replacing the sub-power board(part# SJ-B10N2010A) and if that does not work then replace the power supply board (part #LJ41-05246A) both of which I purchased from Shopjimmy.com. I replaced both and it still does the same thing. Can anyone give me any other suggestions?

Sanyo plasmas have LEDs on the boards that can be used to identify the source of the problem. Are LEDs on any of the boards lit> If yes then which ones? ... Sanyo DP50747 50 in. Plasma TV

Samsung hp t4254 replaced power supply was defective now clicks and wont turn on

... Samsung Flat Panel Televisions

I have Polaroid FLM-4234BH 42in. It just turned off one day. So I checked out the power supply board. Two Caps. were blown. I replaced them but it still wont turn on. Should I replace the whole board or is it something else. thx

... Polaroid FLM-4234BH 42 in. LCD HDTV

Samsung ps43d450 make a bang and then turned off I unplugged it left for a minute and plugged back in all I hear is a clicking noise and the led flashes 3 times and then repeats I thought it was the power board so I put it in the tv down stairs as I have two the same but the power board worked fine so now I am stuck as I have no clue wot is wrong.

... Flat Panel Televisions

Sanyo DP42410 I went to turn my Sanyo DP42410 on and I get a green status light. I also see that the light inverter lights up but no GUI whatsoever. I press every button on the TV and remote yet no luck. I noticed this about 6 months ago. I had it put away for the last 5. Went to turn it on and same thing. Checked the power board in the back and no puffed capacitors.

... Flat Panel Televisions

My dp50747 started turning off, i could hear a click, if i hit the corner of tv it turns back on, then it finaly stopped turning back on, i can wait a few minutes and turn it back on but it turns back off. will stay on if no antannea,dvd ect connected to it.. replaced sub power board. no change.

You need to replace the primary power supply board..or you have cold solder on it. try to resolder that part ... Sanyo DP50747 50 in. Plasma TV

I have a Samsung TV ln32C 450E1d that I recently replaced the power board. Now the TV comes on but if I turn it off and then try to turn it back on I cannot. I have to wait for some time until I can turn it back on. It is like it has a charge that must degrade before I can turn it back on. Any ideas?

... Samsung LN32C450 32 in TV

I have a Samsung TV ln32C 450E1d that I recently replaced the power board. Now the TV comes on but if I turn it off and then try to turn it back on I cannot. I have to wait for some time until I can turn it back on. It is like it has a charge that must degrade before I can turn it back on. Any ideas?

... Samsung LN32C450 32 in TV

Vizio VP322. Replaced 3 bulging capacitors on power supply. TV worked great for about 2 days. Now it wont turn on. The Vizio is lit up orange on the bottom but thats it. If I unplug the wiring harness going to the input board the screen will light up black but goes back out as soon as plugged back in. If I unplug all but the AC power cord I get 5V off power supply on one and 200 on both VS and VA. I'm not detecting power at those when all harness are plugged back in.

... Vizio VP322 32 in. Plasma TV

Samsung 52 lcd wont turn on and i have replaced power supply

... Samsung LNT5265F 52 in. LCD HDTV

A detailed question is important to get you a relevant answers

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
all rights reserved to the respective owners || fullblownbass.com || Terms of Use || Contact || Privacy Policy
Load time: 0.3364 seconds