Re: Problems with Samsung 740N monitors

Thank you for your comments. Just to clarify, the failed caps are CapXon. On the first photo, the failed caps are the three nearest the upper heatsink and they are CapXon KF 10v 1000uF. On the second photo, it's the three caps to the right of the upper heatsink. They are also CapXon but GLs 25v 820 uF. There are some SamXon to the right of those but they appear to be fine.

So with that added information, are your conclusions the same?

If so, why does a company like Samsung use caps from a known bad supplier? Maybe...

Re: Problems with Samsung 740N monitors

I took your suggestion and am posting photos of two different power supplies that are from 740N monitors. The encircled caps are all bulging. I know on the second one that replacing the caps and the fuse restores operation....

I am new to this site and hoping there are a few of you out there that can help me get to the bottom of a problem with a number of Samsung 740N monitors that have been failing after about 18 months of continuous operation. The symptom is no picture and bulging capacitors on the power supply/inverter board. This is a typical flat panel power board where the backlight inverter and video controller power are integrated onto the same circuit board. The monitor is repaired by replacing the capacitors and replacing a fuse that supplies power to the backlight inverter circuit.

Samsung...