| Electronics > Repair |
| Acer 4K monitor troubleshooting |
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| fiskmaas:
--- Quote from: Traceless on May 19, 2023, 11:59:38 am ---@fiskmaas: It might be a bit different for you since you have an Acer unit, not a Samsung. Someone documented their troubleshooting process for a faulty Samsung supply (see video below). For for those Samsung screens it is easy to diagnose because they use an external DC power adapter so you can just swap the faulty one or hook up the screen to a bench PSU. I assume your Acer has an integrated supply with IEC-cord? --- End quote --- No it's an external PSU aswell. I don't have any PSU that's equivalent I think, but I'll check. |
| fiskmaas:
So I removed the cable from the power brick for about 1 hour, and flickering started when powering up again. The power LED did not flicker at all, so there's that. I'm assuming it's not the PSU. Can I troubleshoot further to narrow it down somehow? Someone mentioned inverter/cap temps. |
| Traceless:
--- Quote from: fiskmaas on May 19, 2023, 02:02:50 pm ---... The power LED did not flicker at all, so there's that. I'm assuming it's not the PSU... --- End quote --- Unfortunately you can't rule out the power supply yet. While the LED dimming is an indicator for a problem with the PSU, just because the symptom doesn't show on your unit doesn't mean the power supply is okay. Getting a spare DC-Adapter for the screen might be the easiest way to proceed. Sometimes replacements from the original manufacturer are pretty expensive. In this case you can look for aftermarket ones on amazon. If you have a multi-meter you could check the DC-adapter's output voltage and see if it matches the specified voltage. If it is too low this points towards a faulty supply. However even if you see the correct output voltage that does not necessarily mean the PSU is okay (because you are measuring without a load). |
| fiskmaas:
--- Quote from: Traceless on May 19, 2023, 03:19:49 pm --- --- Quote from: fiskmaas on May 19, 2023, 02:02:50 pm ---... The power LED did not flicker at all, so there's that. I'm assuming it's not the PSU... --- End quote --- Unfortunately you can't rule out the power supply yet. While the LED dimming is an indicator for a problem with the PSU, just because the symptom doesn't show on your unit doesn't mean the power supply is okay. Getting a spare DC-Adapter for the screen might be the easiest way to proceed. Sometimes replacements from the original manufacturer are pretty expensive. In this case you can look for aftermarket ones on amazon. If you have a multi-meter you could check the DC-adapter's output voltage and see if it matches the specified voltage. If it is too low this points towards a faulty supply. However even if you see the correct output voltage that does not necessarily mean the PSU is okay (because you are measuring without a load). --- End quote --- Allright, I checked with multimeter. Output is 19.5V. Rated 19V, 7.1A. Not sure I have anything that high voltage/amperage that I can swap with to be sure, but output looks ok at least. |
| fiskmaas:
Hey guys. So I've opened the monitor up and I'm trying to swap the backlight leds, as many of them have gone bad. Monitor is basically unusable with dark bands all over. I'm wondering, where do I even find replacement parts like this? I've searched a bit but I can't really find much. Am I shit out of luck? Attached a picture with part(?) number (E88441 94V-0 CS-1) |
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