Samsung HP-S4233 Picture going out

[tom66]

Re: Samsung HP-S4233 Picture going out

With the no signal screen showing, heat the area around those caps, and the nearby transformer, using a hairdryer. If it cuts out quickly, narrow down the particular area causing the fault. It's almost certainly heat related, just we need to find where the fault is.

[TimT]

Re: Samsung HP-S4233 Picture going out

I heated it up. it did not cut out quickly tho.. heated the caps & transformers i did notice a slow steady drop in voltage. from 197.4 to 195v finally it did cut out. but I got it Hot. then I turned it back on with my hand about 3 inches above the transformers I can feel the heat. turned it on with the picture on screen it ran for about 3 minutes before the picture went out. also when the " no signal " is on the screen this is in a blue box. there are some dark static like pixels. there not bad at all

[tom66]

Re: Samsung HP-S4233 Picture going out

The static pixels are another fault that can be corrected later, due to incorrect adjustments. The Vs should be dealt with first. Both Samsung plasmas I have serviced have had sparkling pixel problems, easily fixed.

Can you try lightly tapping the transformer and heatsink with an insulated screwdriver to see if it cuts out?

[TimT]

Re: Samsung HP-S4233 Picture going out

that did not seem to shut it down. and checked the voltage with no signal screen as i was tapping the regulators and heat sinks. stayed at 197.4

[tom66]

Re: Samsung HP-S4233 Picture going out

Hmm, try focusing the heat around this area instead.

[TimT]

Re: Samsung HP-S4233 Picture going out

That shut it down.. I may have used to much heat as it wont start all the way back up. it " ticks " back on but only getting 4v at Vs. may have heated the cap up to much...not sure. don't seem like I used as much heat as i did the other day. but I new I was going to have to replace some parts so no big deal. two 5 second bursts from the heat gun.

[tom66]

Re: Samsung HP-S4233 Picture going out

Nah, it will come back, just let it cool down for half an hour. I have similar issue with 37" Philips. Works for 10 minutes, Vs collapses and it shuts down. My problem is with PFC section though so all other voltages die at same time. Freeze spray can bring it back to life instantly.

I'd say replace that little capacitor in that area.

[galltv]

Re: Samsung HP-S4233 Picture going out

I'm having the same problem with my HP-S4233 . Replaced the little capacitor and it's still doing the same thing .