My Sony TV not connecting to internet is a sudden thing over the last few days, been working fine for a couple of years. Have switched off and unplugged to no avail?

SOURCE: Linksys WRT54GX2 constantly disconnects

I just upgraded from firmware version 1.01.14 to 1.01.22 and I have the same problem, the router just keeps resetting itself. I think the solution is to go back to the old firmware, but I haven't been able to find a copy yet, Once I find firmware version 1.01.14 for the WRT54GX2 router. I will let you know if this is the solution... :)
WRT54GX2

SOURCE: Wireless internet problem,help please

Please disable firewall if you have on your computer and then check for the issue

Regards
Syed

SOURCE: Samsung DLP TV bad picture

Some Samsungs have a problem if the set is turned on bfore the input put device due to a firmware issue. Try turning on the device (game, DVD, etc) BEFORE turning on the TV.
Let me know if this helped.

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SOURCE: Sony, SXRD Projection TVKDS-55A2000 Was working

Same thing happened on mine, you need to replace the bulb, on our TV I have 2 kids so the TV was always on but lasted 2 and a half years which impressed the warranty people. From what I have heard the average life is about 2 years. I have the same SXRD TV.

SOURCE: Screen does not switch on, mode light flashes orange

Need to remove the Input module circuit box from the bottom of the center and wait for few minutes before putting it back.

This will reset the system from this persistant power off problem.

Best way to prevent it from happening again is to manually switch of the power switch before doing any powering off and on. Most commonly happens during a power failure and power coming back on with the switch in the on position.