Problem Philips 27PT543S37A L01.1U TV

smcacc03 · Guest

I have a problem with my 2 year old Philips TV 27PT543S37A L01.1U AC-7638 not powering on properly.

Problem: Power on TV, TV will make a humm/buzz/click noise for no more then 5 seconds and then the TV appears to go dead but the green power-on light stays on. It will stay like this indefinately with no picture sound or power. If I hit the up/down channel button one time it will click/buzz/humm again like its powering up then go dead again as before 5 seconds or less.

Workaround: However, if I continually press the channel up/down button it will no longer go dead after 5 seconds or less and the picture will slowly start to appear on screen, garbled at first but slowly grow larger and clearer to fit screen until it looks like a normal picture after about 30 seconds of continuously hitting up/down channel button. At this point the TV will run continuously without problem until the next time it is turned off. I also noted that if after running correctly for awhile and I shut off, then turn back on, the length of time I have to contually change channel to get picture is shorter then the 30 original seconds when cold. The length of time it takes for picture is exponential to the amount of time its benn since I turned off TV eventually going back to square one. So to me it appears when warm the picture comes on that much quicker.

I hope this clearly states the problem and not too much info. Sorry for the length. Any clear answers/help (I am not an electronics wiz) would be greatly appreciated. I am hoping to tell a friend with more experience the resolution if I can find it and the parts etc.

kpn · Joined: 09 Feb 2006 Posts: 3

I have the same problem with this TV and can not find out any information can someone please help

Guest · Posted: Sat Mar 24, 2007 5:34 pm Post subject:

same problem on philips model 27pt543s37a will not power-up without changing channels for 5 minutes. I found a site where tech's post Q & A's, the transistor number 7461 is leaky between collector and base - needs to be replaced, and a capacitor rated 47 uf (microfared) at 25 volts, should be upgraded to a 47 uf at 63 volts, with a temperature rating of 105 degrees vs 85 degrees. Hope this helps, I guess we were lucky that ours lasted 3 years prior to problems.

Don

nevraphilips · Guest

I have just ran into the very same issue with Philips model number 27pt543s37a and the set is just almost 3 years old. I do hope this is a repair that the average handy, somewhat knowledgeable with electronics at least computer repair...can handle. By the time I can get the picture to remain on, the news is over! Only reslove I can see at this point is Boat Anchor or Class Action suit! Any Intrest??? I have a 20in Zenith that has worked great since college, which at 47 years of age...was not under 3 years. I do realize that television sets have dropped in price, but quality or workmanship should not be the ultimate price. Whats a person to do? Thanks again and if nothing else at least we can see we are not the only person experiencing poor consumer choices! Maybe next time I'll check out these sites prior to my purchases! Thanks

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

C2455 47m @ 25v. is a common problem. Replace it with a 47@50v and it should never happen again.

weworkwithu · Guest

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

http://www.samswebsite.com/photofact/pf_search.asp

bash · Joined: 10 Sep 2007 Posts: 8

bash · Joined: 10 Sep 2007 Posts: 8

Guest · Posted: Fri Oct 12, 2007 8:32 am Post subject:

f the set runs for approx 30 secs before shutting down check the setting of the screen voltage it is extremely critical, the adjustment procedure given in the manual needs to be followed precisely, only problem is that takes 2-3 mins to do!!!! fine adjustment of screen control may get the set to run long enough to carry it out accurately, great design or what!!!!!!!