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4 years ago, I bought this Dell 22 Monitor ― P2222H, 21.5" 54.6 cm from Dell online. It came with 3 years' warranty.

It worked normally until November 11 2025. Whilst I was using it and it was on for 2 hours, I heard a "zzzzz" hiss for 2 seconds before the monitor, and white power indicator light, went dark!

I unplugged the power cord that originally came with this monitor. After waiting an hour, I reconnected this original power cord. When I pushed the power button, the white power light failed to light up, and the display stayed black. I unplugged this original power cord again.

To rule out a faulty cable, I plugged in this new power cord bought last week.

enter image description here

Source: Amazon.com

Even with the new cord, pressing the power button yielded the same upshot ― no white power light, no display.

Is my Dell monitor broken beyond repair? I'm agape that this $300 USD monitor can fail asudden in just 4 years?!?

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    power light failed to shine white ... what color did it shine? Commented 2 days ago
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    Is my Dell monitor broken beyond repair? ... probably not, but would the repair expense be worth it? Commented 2 days ago
  • @jsotola i fixed this. power light failed to turn on - no color lighted up. Commented yesterday

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Sounds like the monitor's PSU has gone bad. It can be a matter of replacing a couple of capacitors or it could be a bit more complicated. The fact that the monitor uses this type of cable (i.e. feeding AC directly into it) tells you that the PSU is internal - so you can't just get a new one (like you can with those monitors that use external power bricks).

In any case the diagnosing should be done by a qualified technician who opens it up and inspects it - IMO not much more can be said over the Internet without having physical access to the hardware.

As for the time it has worked - no guarantee over that whatsoever - it might be fine for 10 years, it might fail after 1. The lifespan can be shortened if the AC supply is bad where you're using it.

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  • Depending on how electrically/electronically savvy @user196764 is, you could potentially open the monitor and replace the power supply module. Of course this involves potentially messing with parts carrying ~120V, but it's less risky than mucking about in the CRT monitors of yore. You can find scavenged and aftermarket supplies on eBay and the like, I found one for $30. Generally it involves opening up the back of the monitor, locating the board, unscrewing and removing it‚ disconnecting all the connectors, connecting the new one, screwing it back in, then test and close it up if it works. Commented 2 days ago
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    60-70% chance that it can be rewired for external 12V or 19V power brick from an old laptop Commented 2 days ago
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    I fixed a flat screen tv where a few large capacitors had blown in the PSU. So yes, open it up and at least visually check the obvious components. $20 (including the soldering iron) instead of $600. Totally worth it for saving the planet and if you draw more satisfaction from occasional successes than frustration from frequent failures ;-). Whether it's economically sound depends on your hourly wage, your skill (translating to time needed) and whether you find electronics and puzzles more entertaining than your day job (so that you are willing to pay for it, so to speak). Commented yesterday
  • @DoktorJ As simple as a repair like this might be, it's still very different than something that's intended to be user-replaceable - like an external PSU that you can unplug before re-plugging a new one. Commented yesterday
  • @KamenMinkov yes, but swapping a board is still substantially easier than troubleshooting individual component parts and possibly replacing them (which would require soldering tools/knowledge, possibly including surface-mount work). Much like I won't try to replace my truck's A/C compressor myself, but have no trouble replacing the battery or changing the oil (while there are people who would rather take their vehicle to the shop for even that). Commented yesterday
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That monitor has an internal power supply unit (PSU) and an audible "zzzzz" buzzing or hissing suggests to me that something in there has failed or been shorted by a foreign object. Either way there will be internal damage.

That damage may be repairable but without tools skills and experience it may be beyond your ability and it may be beyond economic repair by a professional.

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