Question about Gateway PLSM46TV 46 in. Television

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Had to disconnect y-sustainer board

When i first got tv powered up but no picture. I opened it up after browsing internet for solution and disconnected y-sustainer board and now I have poor picture and sound. I guess I need to know what to fix so that I can plug y board back in to fix picture. Thanks

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I replaced the module on YSUS board and replaced the FS2 fuse on hp cptoh-0602 plazma tv. TV worked great for about 2 hrs of usage time. however, while i was changing the channal few days later since...

Usually, when you replace Y-sustain board, for older plasma, they suggest to replace both Ydrive board (up and low). And sometimes, Z-sustaint.

Im not sure your are an expertise in this matter so be very careful when you open a TV because hasardous voltages can kill you in the worst escenario.

If you are not, don't work on your TV. It will be your sole responsibility.

Check ships on Y drive board (both board are installed on the right side of Y-sustain. They have square black ships that used to get bad. If they don't have aluminum cooler on them, you can see if they are burned or have holes on them. Old plasmas use to have issues with those boards. Before you installed the Y Sustain you should check Ydrive boards. Maybe you damage the Y Sustain because the Y drives weren't good.

Try to replace the fuse, disconnect the Ydrive from Y Sustain, turn on TV and check for voltages on Y sustain (panel has a sticker with each voltage). Hope you didn't damage Y sustain and can find Ydrive board to fix your TV.

And REMEMBER, you can kill yourself when you work on TVs.

Sep 26, 2011 | HP PL4260N 42 in. Plasma HDTV

1 Answer

How do I test the y-sustain main board from a philips plasma model is 42PF7220A/37 the Y-Main sustain number is LJ92-01200A....both buffers tested bad but now I dont know how to test the y-main...i...


As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.

Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.



Sep 13, 2011 | Philips Flat Panel Televisions

1 Answer

My vizio p50hdm made a popping sound from the rear. Afterwards, the picture disappeared and tv screen was black (as if the power was off). Then within a minute the picture reappeared but looked real dull...

The z-sustain board is bad. One of the the heat sinks on the board is cool to the touch. These had LG circuit boards and the number on the sticker, on the board, was a good LG part number. The part numbers were 6871QZH044A.

Do a search on the internet with Google, Yahoo, or Ebay with this part number. The board unplugs and the new one plugs back up. Not an advanced technical repair. Unplug the set and take the back off and match the picture on Ebay with the one in your set. And especially match the part numer.

May 24, 2011 | V, Inc. Vizio P50HD Plasma Television

1 Answer

LG plasma screen TV working fine last night. This morning to all intents and purposes the TV is dead. The power light is on but no picture or sound. Tried switching everything off at mains, no change....

if you want to fix the problem it needs trouble shooting and of course a digital multi meter. first you need to open the back cover, and then before you trouble just look the components first at the power supply, control board or at Y and Z sustain board if their are, burnt parts, blown fuse and also capacitor with bulged and leak on top of its will help you a lot to determine the exact problem.then your next step disconnect load side connector of the power supply to discharge excessive load voltage,then try connect all the connectors again and turn on the power, check output voltage at the power supply according to its label.then check all the supply going to Y and Z sustain board also observe if their is a indicator light at the control board.

Apr 23, 2011 | LG Flat Panel Televisions

1 Answer

My panasonic viera tv has two lines running top to bottom what are they and how do i get rid of them or is it knackered

If you pull up the tv menu are the lines visible in the menu. check the connectors on the c boards accross the bottom to the flex cables to the panel. Be sure to disconnect the power supply from the sustain boards before you mess with these because the stored energy from the power board will burn the flex cables to the panel and you will have to replace the panel. So be sure power supply is disconnected from the sustain boards and the sustain boards are disconnected from the c boards. Be sure to reconnect everything before power back on. Double check sustain board couls be damaged if not reconnected. This tv is known for connections loose to the panel from the c boards at the bottom. Next would be to replace the c board that corresponds to the stips. If that does not fix then The panel is bad.

Mar 25, 2010 | Panasonic Viera TH-42PX80U Plasma TV

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2 year old Pioneer PDP-5070PU plasma TV with red standby light blinking. Have unplugged for up to 2 hours and when TV is turned on, a distorted picture appears for a second or two and then TV shuts down...

While not aware of particular problems with this TV (others may know it better) based on the description and my practice with plasmas I'd be inclined to believe that one of the two sustain boards is near end of life.

Could also be problems with the power board, usually caused by dried out capacitors, but could not find reports of that through Google, so my first idea holds.

If you have a screwdriver, muscules to move it around and patience to unscrew all the bolts that hold the back panel you can actually test my theory by disconnecting each sustain in turn and seeing if the TV powers with no problems.

The sustains are the two large boards - one of each side of the display - left and right. Each sustain has a pretty fat power cable connecting it to either the power board or the other sustain (through which it may be getting power).

If I have to guess I'd bet on the Y sustain, which is the larger of the two, usually staying on the left side.

But that's just a guess - could be the other as well.

And, of course, could be just about anything else.

This is just best guess based on experience.

Good luck!


Jan 23, 2010 | Flat Panel Televisions

1 Answer

With no picture but only sound on my Akai PDP 4294

Try replacing the Y-sustain board. Might have to replace buffers attached to it too. Have you had it diagnosed? My picture went out and I replaced the power supply board. Worked for 2 weeks then acted up again. Got a different power supply board. Same thing 2 weeks later. Was told it now was a bad Y-sustain board. Replaced y-sustain board. Worked OK for about 2 hours then started having picture issues. Not the same issues before power supply or y-sustain problem. Was told that you might have to replace buffers attached to y-sustain when you replace y-sustain. Tired of dealing with it and only watch a couple hours a day, so I don't always have the problem unless I watch the TV for a long time. Will eventually replace buffers to see if that works. I would definitely find a place that gives free estimates or close to free to get a technician diagnosis. Then you can decide if you are able to do the work yourself.

Jun 06, 2009 | Akai PDP4294 42 in. EDTV-Ready Plasma...

5 Answers

42pf7321d/37 phillips plasma tv

i am familiar with this power supply in philips models. this fault code on the psu refers to a fault within Vscan circuitry. you will be unable to check correct voltages as the set is in protection mode.

you can disconnect the Y-Sus board(to the left of the psu) and if the led stops flashing you can almost guarantee the Y-Sus pcb is faulty!

Jan 13, 2008 | Flat Panel Televisions

1 Answer

Picture is snowy/dark

update: Well, we ended up calling the repair man and we had a bad Y-sustain board and also a bad Z-sustain board. According to the guy who fixed it, it was due to over use of the TV and using main power button instead of shutting off through the cable remote. 650.00 later and a few weeks later, we now have a fixed plasma. No real suggestions on how to get more life out of the new boards.

Sep 12, 2007 | Zenith P42W46X 42 in. Plasma EDTV

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