This weekend a very close lightning strike took out several devices in my house. Among the casualties were:

• 2 TVs
• 1 cable modem
• 1 cable box
• 1 garage door opener

One of the TVs, the cable modem, and the cable box were all plugged into power supplies that reduced 120 VAC line voltage to 12 VDC (or similar). I tested all the transformers and they are all fried (none of them produce anywhere near their rated output now).

I replaced the cable modem and cable box, but the TV is an expensive item I'd like to salvage if possible. I can replace the power supply for about $15. Is there any chance that the supply "took the hit" and provided enough protection to save the TV? I don't have an easy way of testing it without just buying the replacement supply.

As a more general question, how much protection do consumer grade power supplies provide against voltage fluctuations? I know there's nothing consumer grade that will stop a direct lightning strike, but do they provide effective protection against voltage spikes and drops caused by other disturbances?

EDIT: As it turns out, the $15 power supply did "take the hit" and protect the TV.