Laptop batteires serve to power your CMOS (Carbon Metal Oxide Semiconductor) on your laptop, and keeps your internal BIOS clock accurate. On Desktops, it's a lithium battery on the mainboard.
Also, check to ensure that you do not have a battery recall on the unit as well, as you may be able to get a free replacement.
If your clock is off by a few minutes, change time servers in the windows clock option. Just double click the time on the task bar, click internet time, and you can this one if you don't have it listed: nist.expertsmi.com Some are overloaded due to requests. That should keep you with arc seconds on the actual usno time clock.
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Since it is a desktop when you attach the power cord is the fan running on the power supply? If it runs but still doesn't power up.
I don't know how many memory sticks(modules you have) but try them one at the time. All in the first slot and so on and so on. the CMOS battery good or bad makes no difference in connection with powering up. Also locate the jumper that clears BIOS settings but if the PC doesn't power to begin with it makes no difference. Read the first lines of this posting.
Unfortunately, the Acer site is worthless as far as documentation, so I will just give you the generic answer and you will need to fill in the blanks. Typically, the clock battery used in computers is a lithium coin cell. Some systems have larger batteries, but most do not. You will need to open the case and find the battery on the motherboard. It should be about the size of a quarter. It will have a number on it. You should be able to find a replacement at your local drug store, kmart, etc. Just replace the battery and and ajust the clock and you are done.
You are talking about the CMOS battery. It takes a CR2032 and it can be found on the motherboard. It's about the size of a quarter. Just carefully remove the old one and replace it. I'm curious to know why you think the battery needs to be replaced. If you clock keeps the wrong time, the battery could be defective, but more likely is the possibility that you computer just can't keep time correctly. You could try to install a utility like "Atomic Clock" to keep the system updated.
Check the fan is not blocked and is plugged in, (the connector is good connection). If all looks well and the fan still doesn't turn, replace the heatsink and fan, or the fan on its own if you can get one. Most PC shops stock them or go online to ebay
Acer displays that logo to cover up the 'ugly' POST code that runs every time your computer starts up. If it used to do this quickly before but has now slowed down then your computer may be discovering various hardware issues on startup. This can also happen if your CMOS battery (which keeps the internal clock working) is running down.
First thing to do is update your BIOS by visiting Acer's support site and installing the latest one they have for our model.
If this does nothing to improve the POST time and you feel comfortable taking apart your min-desktop. Check for bubbling capacitors. These can be replaced.
If all else fails, check the CMOS battery. It is a small coin sized battery connected to the motherboard. It is a standard battery you can find at the drugstore.
Im not 100% sure about this but may i suggest you change the CMOS battery on the Motherboard, there is a chance that it is flat its a very common battery that you can purchase from your local store, but just change that and let me know what happens
Error Stop 0x0000007B can be related to viruses,hardware failure or a device driver issue.
Lets try this :--
Step 1- Insert windows XP disk and try to get into recovery console.(Can follow instruction displayed on the screen) Step2 - Once you login to recovery console, run chkdsk /p followed by chkdsk /r. Exit the command prompt after chkdsk /r completes and restart your computer and see if that works,.
Step 3 - If it doesnt, try running a repair installation with windows XP.
Step 4 - Insert the windows XP disk, press enter to continue setup followed by press R for repair.
Step 5 - Let repair installation complete and restart your machine to check status of your computer.