Question about Acer Computers & Internet
A 4420-5237 model
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Posted on Jan 02, 2017
All older laptops have the CMOS/RTC battery under the keyboard and usually not in easy access as laptop theft was an issue from day one (password reset). After the keyboard is lifted then either look to the front or rear for two little twisted wires connecting the battery to the motherboard. Some older laptops even have two. And since Acer is a less than supportive manufacturer with a perpetually busy website you might even try looking on EBay for a parts only offering that shows pictures of the motherboard.
Posted on Oct 19, 2008
Sounds like the bios flash has failed, the only thing you can do now is try to flash again, make sure you have the right bios update for that model machine, suggest you get a USB floppy drive so you are able to re-flash the bios, if it still doesn't work then the machine is rendered useless.
Good luck and thanks for using Fixya!!!
Posted on Feb 11, 2009
If you have forgotten your BIOS or system password, there are no software tricks or magical gimmicks that will get the password cleared. Laptops are different in that they are designed to not work with “backdoors” etc. for security reasons. There is one true way that works most of the time and that is hardware.
The Cmos (RTC) battery that is mounted on the motherboard in most cases holds the key, if your motherboard has the battery that is connected to the motherboard by using a two wire socket that plugs into the MOBO, then here is the procedure.
On the motherboard where the battery plugs into, you will see two pins sticking straight up, these engage the plug on the battery side. These two pins have to be “shorted” and then the motherboard powered up for approx. 30 seconds, then power down the system and replace the Cmos battery and reboot. Your password problem should be cleared up. The best way to “short” the pins is get another cmos battery and cut the wires from the battery part, bare the ends and twist together, this will short the pins. Make sure you tape the connection good on the jumper you just made….don’t want to touch anything else with powered up bare wires. Below is the link to your service manual that will point everything out to you. Good luck.
Posted on Sep 24, 2009
Can you give a location of R138?
Is it on the easy side? E.q. the side of the motherboard wich is accessible by removing the bottom plate? I see Q24, located close to CPU. If possible, post a picture of R138, with some components visible.
Posted on May 11, 2010
SOURCE: I cannot remember the password
cmos bateryy resets just the ios passwords. For windows , press f5 uittill the system is booting, enter in safe mode, go to control panel, accounts and set a new password for your account
Posted on Mar 24, 2011
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