I also have a Toshiba TP55H60. I bought it in 2000 from Sam?s club with 5 years extended warranty that is over now. My TV lately started problem when it is powered on.
When the TV is switched on, its screen is blank, no sound, and the standby/power light is flashing every second. This problem is fixed temporarily by unplugging the power chord from the outlet and it is plugged back after sometime. This problem has steady increased by time. I will appreciate very much for any kind of advice. Thanks for your urgent reply. SH
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I also have this problem on a set that is a year and a half old. The repair man was here yesterday with some parts that didn't fix the problem...he said the screen needs to be replaced! Luckily I bought from Costco, who extends the warranty by a year, so we won't be out any money. They will be getting back to me with what they are going to do...repair or replace...depending upon what is most cost effective for them. I will be trying to purchase extended warranty for this TV, if repaired, or new TV, if replaced. Too many horror stories out there on all brands not to.
It sounds to me that the Main board is causing the problem. But I would get in touch with Toshiba for a warranty repair. It has a one year parts and labor warranty. It makes it a lot cheaper for the pocket.
It's really your call on the extended warranty - obviously I don't opt for one on any of my home electronics but I have taken out a policy or two on appliances. (I don't repair them)...
Like most averages something may never happen to the unit. That's how the warranty company makes their profit. But if something does then you have that piece of mind knowing that you're covered... (As a footnote I should add ONLY if you purchase a plan with a reputable warranty provider. There are MANY providers that I would NEVER do business with regarding extended warranties.)
I have been in MANY homes where the people were simply ecstatic that they had opted for the extended warranty. And on a four year old Tv the repair came to more than the Tv was worth..
That Toshiba you have there turn it on and listen to the hum. Turn the unit off and pay close attention to what the hum does. If the sound stop readily it's probably the color wheel. If it's still there for several seconds it's probably the fan. The fans are designed to remain running for several seconds after the power is turned off to help with cooling..
You might find a reputable shop locally and ask about the option of having the color wheel rebuilt. Tri-State module rebuilds some color wheel assemblies, and if they can do that it will be at a fraction of the cost of a new one...