Samsung Syncmaster 2693hm - flicker on startup

[Delicieuxz]

Issue: over a couple weeks, black flicker on turning on after having been off for a while has grown from a few seconds to nearly a minute.

I've opened the monitor up and see no obvious fault, such as bloated caps or burnt pcb
- but a few weeks ago there was detected a burning electric smell in my computer room for which I found no source and which disappeared after a while.

I haven't seen them listed elsewhere for the 2693hm, so I'll list its cap values here for other people:

3x 1000uf 35v
1x 1000uf 25v
2x 2200uf 10v
2x 47uf 50v
2x 22uf 50v
2x 2.2uf 50v

And there's one more that I can't discern because it has caulking covering it, CP803. 13 larger capacitors in total.

I have pictures I'll try to upload in a next post.

[Delicieuxz]

Re: Samsung Syncmaster 2693hm - flicker on startup

Urls for images of the power board are:

http://i.imgur.com/mK1mSKd.jpg
http://i.imgur.com/4ZPIo4B.jpg


I'm doing things on a tablet and it's a bit awkward.

A previous thread I made regarding the issue is here:

https://www.badcaps.net/forum/showthread.php?t=41718


I'm thinking to just replace all the caps and hope it fixes things. I don't know if I can presently turn the monitor on as it's presently disassembled.

[Delicieuxz]

Re: Samsung Syncmaster 2693hm - flicker on startup

http://i.imgur.com/4ZPIo4B.jpg

http://i.imgur.com/mK1mSKd.jpg

[Agent24]

Re: Samsung Syncmaster 2693hm - flicker on startup

If the problem goes away on a warm start, bad capacitors are likely, the hairdryer trick as already mentioned may confirm this.

But it could also be a lamp\wiring issue.

You should probably also check for cracked solder joints in the inverter area, around the transformers etc.

Also please upload your photos to the forum, it makes everything easier. (See: https://www.badcaps.net/forum/showthread.php?t=1868)

[Delicieuxz]

Re: Samsung Syncmaster 2693hm - flicker on startup

Hope the pictures show as attachments for this post. Front and back shots of the power board, and front/back doors of the power and inverter board.







[IMG]https://www.badcaps.net/forum/attachment.php?attachmentid=98561&stc=1&d=1415331802[/IMG

[diif]

Re: Samsung Syncmaster 2693hm - flicker on startup

Can you have a sniff at the four corners of the screen ?, if it's burnt wiring at the connection to the tube you might be able to smell it.

[Delicieuxz]

Re: Samsung Syncmaster 2693hm - flicker on startup

I smelled around the monitor screen and sensed no smell, and no cracked solder joints around the transformer.

I pulled the caulk covered cap out of the way and it's another 22uf 50v, so the total list of larger caps for the Syncmaster 2693hm is:

3x 1000uf 35v
1x 1000uf 25v
2x 2200uf 10v
2x 47uf 50v
3x 22uf 50v
2x 2.2uf 50v

[Delicieuxz]

Re: Samsung Syncmaster 2693hm - flicker on startup

I replaced all the listed caps on the power board and reassembled my monitor, and now it's functioning all well.

I've been turning my monitor off and on and appreciating the experience of it working. It takes ~2 seconds longer to light up after the power button is pressed than it had with the previous caps, but then it comes full on in one moment.

Move over Tesla, I am en electric god! Ah ha ha ha!

Thanks everyone for help.

[selldoor]

Re: Samsung Syncmaster 2693hm - flicker on startup

Well Done! hope it keeps going for you.

[milano maroon]

Re: Samsung Syncmaster 2693hm - flicker on startup

I know this is an old thread but I just wanted to say thanks to you guys!

I have a Syncmaster 2693HM which I rescued from someone throwing it away due to a flickering display. Ordered the caps listed in this thread from Digikey and replaced all except one (was in a confined area and thought I might do more harm than good with my amateur soldering skills).

Anyway I now have a working monitor which comes to life quickly and no flickering.

Now if I could just get my Bose Sound Dock working again...