Hi all, I have a Vizio plasma when i plug it in the orange vizio light comes on and when i push the power button the vizio light turns white and i hear clicking but no picture comes up. I am not familiar with Plasma tv's but i did check the fuses and there are no bulged caps. From what i have read it sounds like power supply problems but instaed of ordering one for $50.- 80. i would like to find out whats bad if it is indeed the power supply. Hopefully the pictures will help.
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Vizio vp422hdtv10a won't turn on
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Re: Vizio vp422hdtv10a won't turn on
Look carefully in a dark room, does the screen glow slightly?
Do you have a DMM to test voltages?
What model # is printed on the "panel sticker" e.g. LG ELECTRONICS PDP42K5##### MADE IN MEXICO.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Vizio vp422hdtv10a won't turn on
I looked in a dark room and can not see any glow at all. Yes I do have a DMM and these are the voltages I get.[LIST]
In standby mode / with power on
CN8003
5vsb-5.29v/5.29v
PS-ON. 4.07v/.409v
AC-DET. 5.18v/5.16v
D5V. .250v/5.17v
D5V. .250v/5.17v
D5V. .250v/5.17v
CN8002
VS-ON. 000/3.22v
AC-DET. 5.18v/5.16v
RELAY. 5.19v/117.8mv
D5V. .250v/5.17v
D5V. .250v/5.17v
CN8007-XSUS
VS. 000/206v
VS. 000/206v
VG. 000/14.85v
CN8006-YSUS
VG. 000/14.85v
VA. 000/53.9v
VS. 000/206v
VS.000/206v
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Re: Vizio vp422hdtv10a won't turn on
Voltages look OK, so next check the light on the control board and see if it is blinking about once a second or once every 5 to 7 seconds.
Also see if you can check -Vsc and Ve voltages.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Vizio vp422hdtv10a won't turn on
From what you described above, I doubt that the buffer boards would be the issue, but here are a couple things you can do to make sure that the buffer boards are ok.
Have you done a visual check on all the Ic's on the buffer boards? Can you see any holes in them? Do any of them look burnt? If you don't really know what to look for, try smelling, do you smell anything burnt on those boards when you turn the tv on??
Another basic check to make sure you upper or lower buffer board are not bad would be to completely disconnect the top one, as in unscrew it out and place it away from the tv. Then try and turning the tv on. Does half of the screen appear? if so your top buffer board is bad. If not if still blank, what you can do is the same for the lower. Place your upper buffer board back in, and then take out the lower buffer board and try again. Does the top half of your screen light up? if so your lower buffer board is bad. If not then your buffer boards should be ok, and something else should be your issue.
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Re: Vizio vp422hdtv10a won't turn on
Tom the only green light that is lit is on the power supply and it is on steady. There is a small board under the input board, Is that what you refer to as the control board? Also where do I measure the VSC and VE? I see nothing labeled as such.
Nick, All the ic's are topped with a heat sink and the lower and upper are one board but I tried disconnecting the 3 upper ribbons then the 3 lower ribbons and still nothing.
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Re: Vizio vp422hdtv10a won't turn on
Control board under the input board that's OK.
No IPMs on these sets... IPMs are one module containing all the power transistors but these have separate IPMs.
If you -Vsc is that low, panel will not work properly, but some image should still be visible faintly (maldischarge: pixels not lighting, etc.), so you could have a bad buffer board.
You should try checking -Vsc with buffers out BUT check it just as it shuts down because a lot of these sets now will turn off within a few seconds of buffer removal so you need to probe that voltage as it is plugged in and see if it hits -190V then drops out.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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