I have a Vizio 500AR 50 inch. I've replaced both boards with new ones n now I'm back to my original issue. Sound. Black picture.

SOURCE: 50" Plasma Vizio P50HDTV10A - no video - just flashing B & W

Don't replace anything, Vizio has issued a lifetime warranty for this set because of this problem. No joke, call the customer service line and tell them you got the pop of death. They'll send someone out to 'repair' the set free of charge. If they can't fix it they'll give you a new one. Even if your mfg purchase warranty has expired. Call them and post the results. I've been fixing TV's longer than I care to admit and this is the first time I've actually seen a company stand behind their products like this. I bought a broken tv with the intent of fixing it and after replacing almost every board I could only manage to get the vertical racing stripe line, except mine was purple. I put it all back together and called to find out if there was a recall on this set and within 5 minutes the (Actual English speaking) gentleman told me to sit tight and he'd have a repairman come and do his thing. He did, and long story short, he couldn't fix it. Last week they delivered a new TV to replace this one. I was shocked. I think Vizio will have all my future business.
Good luck.

SOURCE: Vizio 50 inch plasma tv has no picture and no

check the Y-sus and Z-sus board

SOURCE: Y Sustain Board Replacement

Store 1:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110507378318&ssPageName=STRK:MESE:IT

Store 2: http://www.coppelltvrepair.com

Helpful information:
http://blog.coppelltvrepair.com

SOURCE: vizio p50hdtv10a. Tv has sound

sounds like you needed to replace your video fuse before anything normally if you have video but no sound its an audio fuse and vica versa if for some reason both were out I would say your in need of a new power supply I would suggest replacing the fuse and if it still does not work contacting a service tech to run a diagnostic to see what exact part or maintenance you need

Robb

SOURCE: Vizio has sound but no picture, 50 inch

I have the P50HDTV20A. When I turn mine on I get sound but no picture but if I leave it on for about 15-20 mins and then turn off then back on it will have picture and sound. It seems as though as something has to warm up so the picture will come on.