Toshiba HD made a popping sound and went out.

When was the last time u replaced the projection bulb,yes it could be that simple the projection bulb it dead.The bulb last only about 1 or 2 years,by using the tv on about 4 or 5 hours a day.

call tech support...tell them # of flashes

That unit has a NTSC tuner. May be HD Ready but it does not have a digital tuner. Unless you live quiet close to a local Broadcaster, rabbit ears would be useless.
The only way you would be able to get HD is using a HD Set Top Box, HD Satellite System,
or HD Cable BOX, using the Componet or HDMI inputs.
Hope this helps
Skyassoc

Needs a new bulb.

it sounds like the soundboard went out on the tv..its probably worth fixing but you have to know what you are doing if you do it on your own.it could be something more minor too but not sure

HD Ready

I have the same TV, your projection bulb has quit/failed.

A loud pop was heard and the picture has gone followed by a red led fault light clicking on and off.

if your tv is less than 1 year old, and you registered it with Toshiba, you could qualify for a free replacement.

otherwise expect to pay 200.00 for a new bulb from Toshiba.

only good thing is you can replace it yourself, only tool needed is a phillips screwdriver.

you can check EbaY for prices less than 175.00 to 150.00
i am on my 3rd bulb within 4 years....

good luck!

Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.hdtvoice.com/voice/showthread.php?t=28929
Or send to ptscorp.com
http://www.hdtvoice.com/voice/index.php?s=
good luck
please mark the post with a fixya

We will need a list of the everything you tried.
Usually, this kind of thing is caused by hookup errors.

take your set to a tech the tv system control circuit might have damage, that circuit controls OSD,channel memory. it is an ic that controls that circuit along with other components.good luck.