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Depend on model.
For 600VA and above
Go to APC site and check model of replacement battery.
Peel open the front plastic panel and unscrew 2 screws of metal panel.
Batteries can be slid out and replacement done when PC is online.
Only two wires to disconnect and connect.
Try the steps below.
1. Turn the computer off.
2. Take the battery out.
3. Unplug the ac adapter
4. Press and hold the power button for about 15 seconds.
5. Put the battery back in.
6. Plug the ac adapter in.
7. Turn the computer back on.
The diisplay should be back on. Thank you for visiting FixYa! have a nice day.
Try performing a hard reset on the laptop by removing the battery, unplugging the Power Adapter and disconnecting external devices connected to the laptop. Once everything is removed/disconnected, press and hold the power button for around 15 seconds. Put everything back then power the PC on. The reason this issue happens is because the computer doesn't shut down properly and because of this charges get left on the laptop's motherboard, holding power button down with nothing connected to the PC drains these charges. If still the same issue exists, try updating Windows, there might be updates that doesn't install completely. Update drivers as well and run a system scan with your security software.
the vr\ery first thing what u have to do is that disconnect the ac adaptor and take the battery out of the computer and then press and hold down the power button without the battery and the adaptor for one minute and then connect the ac adaptor and put the battery back in and then try and turn it on and what u can do is that try and turn on the computer only with the battery and then take the battery out and try and turn it on only with the adaptor,and then what u can try is that try with the different adaptor having same configuration,and try and connect the ac adaptor into the different wall outlet....good luck
My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to be that I had my laser printer connected to the "surge + battery" side, and for some reason no laser printer can be connected to it.