I have had it connected to the charger for some hours - and it would still not start up. Afterwards I connected it to my computer, but still nothing happened. It worked fine last night, but now it seems "dead".
Have you tried to use the "reset" hole?
The hardware reset pin hole is located between the Micro HDMI port and Microphone.
if this still not work, press the power button for about 20 seconds and still pressing the power button connect the charger and keep pressing for another 10 seconds.
Now I have... Still nothing..
if A1 still not boot, it's time to contact Acer support for a repair.
THis same thing just happened to me this monring.
The tablet recently updated (about 3 days ago) to KitKat 4.4.2 from the original 4.2.2 that came on the tablet.
Last night it was working fine. It was at 40% battery and I plugged it in to the charger overnight. But when I woke up the tablet screen was black and it will not power on. Tried the reset button, the powerkey/volume up button combo, and I even opoped open the case and siconnected the battery for 60 seconds. Nothing worked.
Earlier a month after I ot it the speaker failed.
It appears that the A1-810 is a rather crappy tablet quality wise.
Did they replace the battery?
I dont have a reset button I've looked. but I tried holding the on/off button for ten seconds and plugging it in and holding for another ten seconds and that seems to have worked. I hope it stays on now.
I carried out your suggested solutions in turn: pressing the re-set button, pressing and holding the "On" button & the "Volume" button , whilst plugging in the charger. None seemed to work. Then I removed the micro SD card, in preparation to send the Tablet off for repair, and pressed the "On" button to see if anything would happen and the tablet started! There had been a gap of about 5 minutes between trying the various steps and removing the SD card. Thanks for your suggestions.
If your acer vibrates when you attach it to charger but the screen stays black then very gently take off the rear cover - you can do it with knife starting next to headphones jack. Unplug the battery for several seconds, plug it in again (you might have to take out the battery first to do so) and try to charge the tablet again. Should work.
Pressing the power button for 20 seconds and still pressing the power button connect the charger and keep pressing for another 10 seconds worked. Tried everything else and nothing worked.
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