What is the best computer repair shop near me?

Generally, at a professional level, monitors are "blah" or "BER" due to the cost of labor+parts, unless it's a high end IPS display with 97-99% sRGB or DCI-P3 gamut. Most monitors out there are not this one exception to the rule. Most of the time if I have to take the display, even I shamelessly discard/pass them on due to the poor economics involved, especially older TN panels like the Acers. I will at least check it but if the parts bill is 30-40% of a good modern IPS display (not within the 97%+ sRGB or DCI-P3 range, for fairness), it's not worth the trouble. My stance on this could change with time, but monitors tend to be borderline disposable today with how cheap good IPS consumer grade monitors are today, and with it also being the standard today where TN is reserved for the cheapest built to a price "budget" displays. The cost to implement IPS has made TN a walking corpse that isn't dead, but is very much phased out in many cases.

On the ALXXXX/ALXXXXW displays, they're known to blow capacitors on the internal supply displays and the fix is cheap, but you will need to DIY the repair for economic reasons and replace all of them other then the filter cap, including the inverter capacitor on some (like my early AL2216W had). However, yours is external supply based; find a good name brand adapter that will fit the jack, spec and polarity first, then re-evaluate. If the issue remains, follow these guides to open the monitor and inspect the power supply and video board: Acer AL1714 Power Supply Board - iFixit Repair Guide. For the driver board, check here: Acer AL1714 Video Display Board - iFixit Repair Guide. It looks like this is a surface mount monitor, so the issue may be elsewhere; those do fail, but much less often.

It's rare for the driver board to have issues, though. 9/10 times the issue is due to the power supply alone.