Notice that the top vent on the capacitor is flat and clean. It pushes against the rubber seal on the bottom and lifts the capacitor case off the board.įaulty capacitors that are crusty and liftedĬontrast the damaged capacitors with a good one on the same board. The overheated, dried, and crystallized electrolyte will also try to force its way out the bottom.
That’s the electrolyte that is supposed to facilitate charge transfer across the storage plates.Ĭapacitor C110 is bulging at the top, which means the electrolyte is trying to burst out of the vent. Notice the brown crusty discharge at the top of the capacitor? Here are the actual capacitors in the broken LCD monitors.īad electrolytic capacitors with residue bulging and lift Sometimes it’s really obvious when a capacitor has gone bad, but sometimes it is a bit more subtle. I took some pictures that I thought might be helpful to others in determining questionable capacitors that are installed on a circuit board, regardless of the type of device. So, don’t be dissuaded from trying it yourself. I was skeptical that it would be as easy as desoldering the blown capacitors with new parts, but in one evening I fixed two LCDs!
There are lots of great web pages that include instructions on how to replace the aluminum electrolytic capacitors to repair the monitor. The root cause is a power supply failure due to bad caps. Similarly, my friend’s Samsung 206BW monitor wouldn’t even turn on anymore. Not sure if this makes a difference but the computer monitor will have been on for 8 hours before unplugging.My wife’s Samsung Syncmaster 226BW LCD monitor started failing by flickering, flashing, and blinking at power up. I am wondering how many hours should I leave it unplugged till I start working on it?Īccording to some repair kits you can buy on ebay to fix my monitor problem these are the most common ones that go I don't really want to start buying every tool under the sun for this one job but I of course want to do it safely. So this probably would be 2 to 4 hours when all said and done. Open it up what probably be an hour or 2 and then check what capacitors I need and then get them. My plan was to unplug the monitor and then wait a few hours. Someone suggested that I should discharge the capacitors what makes sense. There are some tutorials on how to open up my monitor and check but I still am gathering information on how to all do this as I never done it before. Here is the problem I have Samsung SyncMaster 226BW that is known for bad capacitors and I think I am a victim of this and want to try to repair the monitor before shelling out at least $133 bucks for a new monitor.
I am a super noob at this and never done anything before like this but want to try.
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