Samsung LN46A500T1F - slow power on - alternating static lines then ok

[hiroo]

Looking for help on my mom's Samsung LN46A500T1F. This was previously fixed with a replacement Tcon board in 2014.

Lately it has been getting slower to turn on, it goes through like 3 attempts to turn on after I push the power button on remote. When it does turn on, it goes through a period with alternating lines of static, then finally goes to to ok picture and works fine from that point on until the next time it is off for a period of time.

Here's a video of the power on symptoms: (EDIT: changed link to working upload)
https://www.youtube.com/watch?v=EGitin9WWks
Disclaimer for the Fox News. It's my mom's tv and that's where it was set!

I'm thinking it is related to power supply warmup.
Any ideas on what the problem is?

[Sevenqi]

Re: Samsung LN46A500T1F - slow power on - alternating static lines then ok

Please take a look at this thread:
https://www.badcaps.net/forum/showth...light=ln46a550

[Davi.p]

Re: Samsung LN46A500T1F - slow power on - alternating static lines then ok

It is for sure an electrolityc capacitors issue, now which one? Can be the ones on the power supply board, in any case change them all except the 450v one, with good brand low esr types, or can be some on the main board, open it up and with the tv cold start warming up the power supply with hairdryer, then switch on and see if it starts well, if not switch soon off and warmup the ones on main board and retry, if it works well on this second try then are the caps on the mainboard to change, if Powersupply and mainb. are near then cover the mainb. with a cloth and tin foil to keep it cold from the first warmup. To know which condenser to change on mainboard you better download the schematics and see the power section of the mainboard, the dc-dc converters that feed especially the main processors, like usually a 1,2v and 3,3v have capacitors on the input and the output, them as to be changed. If the faulty caps are on mainboard i suggest you to change also the ones on power supply 'cause Samsung use always low quality types and the tv is old enough to change them, them can destroy other parts if are not on the best shape. Bye.

[budm]

Re: Samsung LN46A500T1F - slow power on - alternating static lines then ok

We need to see the straight shot pictures of the power supply board.