No image and audio for a few seconds

SOURCE: Sony KDF-E60A20 HDTV

I purchased a new Lamp, but before I had time to install, the problem stopped occurring. I feel that this may be a lamp overheating problem due to dust or temperature and humidity within my house. I was going through power outages due to IKE at the time that this problem showed up. At least I have the replacement bulb to try if this problem shows up again.

SOURCE: every 30 sec I loose audio, 5 more sec and my screen goes black, instant reset then the cycle starts again

it is your HD box. get another one.

SOURCE: HELP! KDFE55A20 watching TV and screen goes black and loses sound

Yes, its most probably lamp issue.
Please but original Sony lamp from Sony store and replace it in TV.

SOURCE: Blacking out for 20 seconds over and over

The lamp is going bad. Very common for some Sony to do exactly what you are describing.

SOURCE: screen goes dark, sound goes quiet...

I have a sony KDF-E60A20 projection tv. The picture would go out for about 30 seconds and come back on. It would continue to cycle this way. The green power light would stay on and not flash. The sound would go off when the picture went out and come back on when the picture came back on. I tried taking the bottom cover off the back exposing the fan and blowed it out with a vacuum cleaner, also taking out the bulb and blowing it out. That didn't help. So I ordered a new bulb from Advancedlamps.com and that's what it was. I have now had it on and off for two days and no problems. Cost of lamp was $107.00 including shipping. Good Luck!