Bad Capacitors - Samsung 226BW LCD monitor
Ron Czapala
Posts: 2,418
Well, this is my second Samsung product to fail with bad capacitors. First it was my 40" HDTV now my 22" monitor.
The screen was flickering like mad yesterday when I booted up. It didn't last long but I know it would get progressively worse.
The tops of the caps become doomed as they swell.
I replaced the bad caps in my TV and I ordered new caps from DigiKey to fix the monitor.
I will fix the old one but bought a new ViewSonic 22" LED backlit 1080P monintor anyway - looks great!
I sure hope the bad capacitor issue has been resolved - this is a pain! I had to crank up the temp on my soldering station to remove the bad compenents.
Here is a video describing the monitor fix
The screen was flickering like mad yesterday when I booted up. It didn't last long but I know it would get progressively worse.
The tops of the caps become doomed as they swell.
I replaced the bad caps in my TV and I ordered new caps from DigiKey to fix the monitor.
I will fix the old one but bought a new ViewSonic 22" LED backlit 1080P monintor anyway - looks great!
I sure hope the bad capacitor issue has been resolved - this is a pain! I had to crank up the temp on my soldering station to remove the bad compenents.
Here is a video describing the monitor fix
Comments
-Phil
I have another Samsung TV from 2009 - I hope it doesn't develop a problem...
Everything you ever wanted to know about the "BadCap" fiasco of this decade. Apparently there are still a lot of these in inventories across the globe. (Make sure your Rubycons aren't labeled "Rulycon"!)
I have a bunch of supposedly audio grade output transistors here that are apparently relabeled 2n3055s. This were purchased over the counter from a regular local electronics store and they continue to sell them, refusing to admit that the Motorola logo on them is fake (90 degrees out of axis from what Motorola does and typeset with a standard M in a circle rather than the true Motorola logo.
Elliot Sound Products in Australia keeps tabs of trends in fakes for those that want to ferret out good parts.
Ron
It finally went south on me and was behaving very erratic.
I opened it up and recognized swollen capacitors. So I exchanged them out with higher voltage and greater capacity ones.
Now it works fine.
I have had a lot of trouble with early flat screen monitors. I suspect that Taiwan's electronic market is flooded with items that fail to export - we get all the rejects. The first one was an excellent bargain, but the power switch failed and zapped all the electronics with a transient that destroyed everything. The second one limps along now and I have to clean it every six months or so. This appears to be due to conductive dust accumulating on the main IC as it is an earlier production of this type. It may even be tin in ROHS solder growing fingers.
Now I have a new ViewSonic purchased on sale that I am quite please with.
These days, replacing capacitors and/or cleaning boards are about the only real service options - not much else is easy to do as parts are hard to locate and even harder to swap out.
Thanks Martin - very interesting story. Makes you wonder whether critcial devices (medical, military) have bad capacitors waiting to blow....