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Philips LCoS shut-off problem.

10-27-2007, 02:01 PM
I own a 4-year old 55" Philips 55PL9773/17 LCoS. A few months ago, it started shutting off for no apparent reason after about 20 - 30 minutes of viewing. So, about 6 weeks ago, I ordered a replacement bulb. Worked fine up until now. It's doing the same thing again. The picture seems perfectly fine; just doesn't stay on for more than 30 minutes. It's almost as if it's over-heating - but the fan seems to still be working fine. Can anyone help?!

11-04-2007, 07:29 PM
I was able to locate a repair manual specifically for my t.v. online at manual universe. Great site and prices are reasonable.

Anyway, after locating the "secret codes" that the technicians would use, I was able to enter the t.v.'s diagnostic system menu and find out exactly what was causing my t.v. to enter protection mode. I was getting error codes for both the PICNIC board and the LAMP ENGINE (More often was the Lamp Engine). So I took the entire t.v apart, checked for obvious flaws, located all the fans to ensure they were working, and cleaned everything with pressurized air. Put it all back together and the t.v. worked like new for 2 days straight. Then, late last night, it shut off again after only 10 minutes of viewing. Waited a few minutes, then turned it back on to check and see what error codes it had. Sure enough, it gave the error codes for both the PICNIC board and the Lamp Engine. It also said that the lamp engine was the "faulty module". Today, the t.v. has been working for the most part. Ran for 2 hours straight, and then again for 4 hours straight.

So, the question is: Is it really the entire lamp engine that needs to be replaced? Or something on the PICNIC board? Or the entire PICNIC board? Neither the PICNIC board or lamp engine are cheap. I noticed on the Philips Consumer Products and Accessories page (specifically for my t.v. model) they have a replacement "resistor". Now, I find it sort of strange that they would be selling a resistor next to there speaker cables, replacement lamps, replacement filters, and other high priced items. Resistors aren't something you expect a consumer to replace. Just my thoughts. If anyone has any input, please share.