Re: LF501EM5F No Power, Chirping/Beeping Transformer


Sorry for the late reply, just turned notifications on so I should be more punctual.

It's hard to say definitively if the resistance on the removed c3214 matters, but if parallel caps are no longer shorted it looks like progress to me. If you want to check that the short is really gone, the easiest way would be to clean the board to get any residual flux removed, then measure the resistance between the 2 unoccupied pads from c3214.

Rather than trying to source a new cap, I really just found...

Re: LF501EM5F No Power, Chirping/Beeping Transformer


I tested it in place as a preliminary check. It read 0 ohms, but as Bud mentioned earlier there are other caps parallel to this one. If one reads short they all read short until the culprit is removed.

Once I removed c3214, I verified that it was short off the board and the other remaining caps read correctly in circuit.

If you are new to (de)soldering I would highly recommend getting some flux and braid, and clean well with isopropyl alcohol before plugging it back in....

Re: LF501EM5F No Power, Chirping/Beeping Transformer



+1 on C3214. I have a model LF551EM5 that wouldn't power up, power supply board chirped when plugged in. Sure enough C3214 was shorted. Different main board than OP but similar layout. Swapped with a cap from a junk samsung phone main board and it's back in action....