Samsung FP-T5084 Won't turn on

[aschubox]

I am hoping I can be pointed in the right direction.

Details: Samsung FP-T5084
PDP Module: model S5OFH-XB01

One day it simply wouldn't turn on. When plugged in the red power light glows steady and upon pressing the power button on the unit or remote nothing happens, no blinks, simply remains steady.

On the inside the 6 fuses that I have located are OK. Visual inspection of the center circuit board has one capacitor that is slightly bulged on the end.

Please any guidance would be appreciated.

[capkid]

Re: Samsung FP-T5084 Won't turn on

I'm assuming your chassis looks like this: https://www.badcaps.net/forum/showpo...80&postcount=5

Please post a closeup pic of the PSU.

[aschubox]

Re: Samsung FP-T5084 Won't turn on

The ebay link just has a Samsung logo...
The PSU is where the AC power is routed into?

I am new to the verbage.
thanks

[capkid]

Re: Samsung FP-T5084 Won't turn on

I just updated my post with the correct link. The PSU, or power supply unit, is the center board you said has a potentially bad cap.

[aschubox]

Re: Samsung FP-T5084 Won't turn on

Here are a few pics.

[aschubox]

Re: Samsung FP-T5084 Won't turn on

It is very similar to the pics in the other post. It appears a heat sink is different. I couldn't make out the bulged caps.

As I said there is only one cap with a bump and a very minor bump at that. Perhaps changing out that one cap may be a first step.


I hope the pics I attached help a little.
thanks again

[capkid]

Re: Samsung FP-T5084 Won't turn on

It's a little hard to tell because of the flash, but I don't see any bulging caps. That doesn't mean you don't have bad caps, though. However, Samsung TVs typically show visible signs of failure.

[aschubox]

Re: Samsung FP-T5084 Won't turn on

Well I have ordered a replacement cap set for the power supply board. We will see if that takes care of it.

Any other troubleshooting ideas would be a big help and may save a little time.

thanks again

[cadiman]

Re: Samsung FP-T5084 Won't turn on

There may also be a mosfet update for that power supply.

Replacing all caps is a good start.

[aschubox]

Re: Samsung FP-T5084 Won't turn on

I replaced what I could for the capacitors, the kit of capacitors was a bit misleading and didn't have them all but covered the few I thought may be bad.

The new capacitors are a bit smaller but have the same ratings on the outside... a newer smaller type?

They all went in quite well and was able to get a good solder joint. Upon repowering the same problem remained... the red light was on steady.

At this point it seems to point towards replacing the remaining caps... even the tiny ones?

Thoughts?

Cadiman can you give a bit more info on the mosfet update?

Oh and upon powering with the back cover off there is a high pitched hum coming from somewhere on the power board. I couldn't pin point exactly where on the board.

THanks