Our 3 year old Vizio plasma TV just made a popping sound and the screen went blank, then about 30 seconds later, a horrible piercing buzz started and we had to unplug the TV to get it to stop...Any ideas?

It just happened to me on 4/7/10. My vizio p50hdm made a popped noise & did not turn on. I purchased the tv at costco on June 2005 w/amex card. I pulled my amex statements from 2005 then called costco with my member # and they found the transaction. If you purchased the tv before 4/2007 the item is grandfathered with the 100% customer garrantee. After 4/2007 the return policy changed to 90 day money back return 2 year warranty and you get an additional year if you purchase w/amex card for a total of 3 years. Be very nice to the Costco people even if they give you an attitude on the return of tv. I got a credit for $2200. I just purchased a samsung led tv 46 series6 back lit & internet. Amazing Technology. & I Love Costco

Ur power supply board is dead,the buzzing noise it from the transformer.Replaced the power supply board should solved this.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

It sounds like the power supply inside the unit has blown. This could possibly have caused severe damage to the internal components of the TV.

At this point you should NOT plug the TV into any outlets as this could cause electrocution or fire.

I recommend you look into getting the unit looked at, repaired or replaced by either Vizio or a Television repair shop. This could end up costing you quite a bit of money - I know how steep some repair shops can be.

Best of luck.

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