HDMI Monitor Problem

[aarondunleavy]

Hello,

I have no experience with electronics but thought I'd post here to see if anyone can help. Thanks in advance for any advice, much appreciated.

I have a Dell S2415H monitor and was trying to use a HDMI splitter between the monitor and a TV. I accidentally powered the HDMI splitter with a 12v power supply instead of the required 5v, and whilst doing so the splitter has fried a component on the main board of the monitor through the HDMI cable. The monitor has now been discontinued so it's tricky to find a replacement, but as I use it as a dual monitor setup I really need it to be fixed to sit alongside my other monitor and to avoid having to replace both.

The front of the board seems fine but the culprit seems to be on the rear side which I've circled. On my other identical monitor the component is labelled 50H1G.

Any help in finding a solution would be greatly appreciated.

Thanks,

Aaron

[amyk]

If the monitor was powered with 12V instead of 5 then I could see it being an RP100N251B LDO that got fried (that one has an absolute maximum input of 5.25V, so 12V would definitely have caused that sort of damage), but your mention of the damage coming in via the HDMI cable suggests it may be something else; an IXD5127 shares the same 50Hxx marking and 5-pin package, is also rated at a damaged-by-12V 6.5V maximum input, and its purpose as a voltage detector also seems like it may be for detecting if HDMI is plugged in.

Then again, there's also the possibility of the 12V damaging something else more important in a less-visible way, which then shorted to ground and took out the LDO.

Figure out which of the above two parts it could be (it might even be something else entirely) from the pinout --- they both have NCs but on different pins.

Edit: IXD5127 datasheet says last two characters are the lot code and excludes G, I, J, O, Q, and W, so it is likely to be the LDO or something else. This is not looking too good... prepare for the worst.

[Rasz]

1 what are the current symptoms?
2 find power rails on the pcb, measure resistance to ground
3 remove fried element, try to power monitor without it and describe what happens

Edit: ... or buy $30 replacement board and move on with your life " https://www.ebay.com/itm/Dell-S2415H-Main-Board-4H-2FT01-A01-P-N-5E2FT01004/173991795226