Question about Maxent MX-42HPM20 42 in. Plasma HDTV

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My 42 inch Maxent went out. Had sound no picture. Replaced Zsus board and same problem. Replaced Ysus and now I almost have a picture. Screen is black but looks like the picture is in the back of the black snow. Picture looks like it trying to come in.

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  • dram77 Mar 20, 2011

    That's great, I will order the buffer board and replace. Hope this works. Thank you so much for your help.

  • dram77 Mar 20, 2011

    I only knew of one buffer board. Where are the other two or other one located?

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  • Master
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Whn the sustain boards go out, its usually due to the buffer boards. Since you have already replaced the sustain boards, replacing the buffer boards should do the trick as these are the boards the control the firing up of the gas inside the PDP(Plasma Display Panel).

Posted on Mar 19, 2011

  • eagle338
    eagle338 Mar 20, 2011

    Remember there are usually 2 or 4 buffer boards in each plasma and you need to replace them all at once as the buffer boards can take out on another

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Picture went black but you could still hear the movie


Hi- My PL4260N stopped working after about three years, the audio worked but no video at all. The TV worked fine until one day...no more picture.
I found out that the YSUS and ZSUS boards in the TC fail alot...BUT you can get new or repaired ones off of EBAY...
First check for failed components (burned, loose, bulging, etc.) if nothing obvious is failed then check the fuses on the YSUS, ZSUS, and power supply boards...usually if a board has a blown fuse the board needs to be replaced...get the part number and search it in Google and eBay and you will find options for replace/repair.
Mine had a blown fuse on the YSUS board...I got it fixed for $75 through coppell TV (they are on Ebay)....
Now my TV works fine again!
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Most likely YSUS or ZSUS board. If you have any picture at all (very dark & cloudy) that would be the ZSUS. If no picture at all, then it is the YSUS. A secondary problem with these is that you generally have to replace the YSUS and Y-driver(s) at the same time.

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its the buffer driver board the big long board that plugs into your tv,, i have one for sale if u need one,,30£..promo7uk2@hotmail.com

free+p+p

this will cause the lines on your tv after replacing the ysus it could well be that ysus mabe faulty still if u replace buffer and find u still have the lines 9/10 times when the ysus goes it normally takes out the buffer board on these worst cases the control board,, but im 98% shure its buffer board.. let me know on here if u find out.

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1 Answer

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Check and replace that board. Just visit the site linked here. Y Sustain board faults and symptoms of plasma display is given in details. http://electronicshelponline.blogspot.com/

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My Maxent TV (MX-42HPM20) of 3 years just stopped displaying picture. Even menu doesn't come up. Power light is on, but screen is black. Any thoughts?


If the television is still getting power, and even more diagnostically important is if you're still getting sound from the device, you've got a back light issue. All LCD TV's work on the premise that your image is displayed using a set of white tube back lights, think similarly to the ones you would have overhead in your kitchen at home. The issue is that if these lights ever burn out, you won't be able to see anything on your TV, like the situation you're in now. You have to get these replaced by a technician. The issue you're going to run into is that Maxent is no longer in business, you'll have to find a service depot in your area that can assist you. The repair is fairly common and shouldn't run you more than about $300-400 at the absolute most.

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2 Answers

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Sorry to say - it sounds like the 'pop of death' - If you got this from costco - give them a call and see if you can claim warranty (or the manufacturer).

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1 Answer

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Looking at it from the back, the board on the left is the ysus. You should see a big red cable coming from the power supply board in the middle of the set going to the ysus. Near the red cable plug on the ysus should be a fuse. Most likely the fuse has blown. If it is you need a ysus PCB. Check out encompassparts.com. If you get a new board be sure to set all the controls on the new board to match the old board. If you don't you will have little sparkles all over the screen when it comes back on. I hope this helps. You may want to check all fuses on the power supply and the zsus which is on the right side of the set. I have seen both the ysus and zsus be bad together. Good luck and thanks.

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1 Answer

Zenith P42W46X 42 inch EDTV


common problems with these, usually customers here a loud pop. then the screen goes blank. I would try...
Some of these have a 4 pin test on the control board that you can jump with solder to get test pattern. If you get it to do that then these boards maybe good and would replace the control board. if nothing happens, then
the upper & lower drive also the Ysus and Zsus boards all at the same time.
last could be a defective panel.
hope this helps. p/n are on all the boards.

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2 Answers

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i havn't been able to get a tech manual yet for this unit..however...the plasma display has lost power...i would replace the X board and Y boards, including the Ysus boards(upper and lower Ysus boards.

Nov 25, 2007 | Maxent MX-42HPM20 42 in. Plasma HDTV

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