Re: Dead Dell P2416db - No standby/power LED detected

Unfortunately this story has a sad ending.

I managed to borrow a working monitor of the same model to try narrow things down.

It turns out, after plugging in the "dead" monitor's panel, that not only would it get no power, but the person I got it off damaged the panel

Despite this, I thought I'd check a few things on the "working" monitor.

Turns out with the "working" monitor:
- mcp2315 also has no power coming out of it. This...

Re: Dead Dell P2416db - No standby/power LED detected

Okay, some more thoughts towards a next step.


1. There's an ldo with marking GH16D. A google says this is really a AZ1117 - [url]https://cdn.badcaps-static.com/pdfs/f1b4606197ef6003eb1bb027ae2b3e9b.pdf[/url]

Interestingly, there's no voltage with this on input. I'm not quite sure where perhaps it should be getting voltage either :-/

I'm trying to understand the pcb layout but I'm more or less a determined novice.

2. There's another part (I'm not sure what...

Re: Dead Dell P2416db - No standby/power LED detected

Hey thanks for that suggestion.

I tried measuring the resistors but found there values jumping all over the place (I'm guessing because they're in-circuit?).

Regardless, I opted for the "let's see if this works" approach, and connected enable to a 1.5v source on the board.

This can be observed in the attached pic.

While I now get 10v out of the mcp2315, unfortunately still nothing on standby led or screen itself.

Any ideas for what I should...

Hi all,

I got given a dead Dell P2416db monitor, and I've been trying to see if I can fix it (and save it going to landfill).

I get no standby LED detected once power is connected, nor any other form of light out of the screen.

- Thus far, I detect 19v on the PSU output pins, however there is a high pitch scream coming from one or two caps (see image 1 - I know these should be replaced, but given).
- Numerous step down converters around the circuit are reporting voltage
- One is not, I have highlighted this in the top right of image...

Re: New Members - please post your introductions here

Hi. I'm from New Zealand :-) trying to repair an LCD screen, and see what I can learn from the forum