i have a 1999 philips magnavox big screen model #9p6034 c102 was watching tv and then it made a static sound and then no noise, i have tryed to turn off & on tv and put volunm up & down but nothing. the picture is working fine, just cant hear anything. please help!!!! it's driving me nut's not hearing anything thanks and the chassis model number is ptv835

"per bullvw - There is also a article at http://www.siliconchip.com.au/cms/A_30321/article.html that lists the most common parts replaced by Philips techs on a dead L01.1 chassis." Here is the article (note that the below article speaks directly to of the L01.1A chassis for a 29" model, not the L01.1U chassis for the 27" model): Philips L01.1A chassis I am beginning to see a few late-model 29PT2255/79R and 29PT2252/79R Philips TVs. I am talking about the L01.1A chassis, which came onto the market about 2001 onwards. The usual problem is that the set is dead due to the fact that the switchmode power supply is cactus. The cause is not yet fully understood but this fault normally occurs during power surges. To fix it, I order and install what I call "Fred's Mod Kit", named after a friend of mine who repairs these sets under warranty. He found that eight parts usually need replacing - the chopper transistor (7521), its driver (7522), IC7520, R3523, R3530, D6523, D6524 and possibly D6525, which is not always fitted. Of course, strictly speaking, this isn't a modification kit but only a replacement parts list. Perhaps a modification will come out in due course? Another problem that is occurring is hum in some Philips models. One in particular comes to mind, the model 29PT4873/79R (L9.1A chassis), which can get particularly bad if placed on a resonating wooden table. The cause is a deflection yoke with vibrating windings and the solution is to remove it and dunk it in Estapol varnish. Beforehand, it is a good idea to mask any areas that might be critical such as where it contacts the picture tube and the three rubber spacers. The procedure should be repeated three times, allowing it to dry after each dunking before reassembling it onto the tube neck. That should stop the windings from vibrating and fix the problem once and for all.

Did you find a solution to this from anyone? My Philips TV is doing the same thing! My model is 32PT81S127 and I can't find anything on the web for this model. I did find some general Philips info at -http://home.tiscali.nl/m.majoor/tv__matchline_service_mode.htm With info from this site I tried using programming codes for other models to disable demo mode without success. I can get the TV into service mode, but not beyond that to make any changes. Please let me know if you have found any answers yet. Thanks!

Make sure that "Stereo" & "Speaker ON" is selected on the on screen menu. If your set has a "Ear Phone Jack", and it has been used, or a small child has stuck any thing into the jack, it may be damaged, which will kill the sound. If resistor 3682 (8.2k @ 1/10w) is missing, or loose, on the front control board, will kill the sound. Good luck, pw