Motherboard battery replacement or Fixing CMOS errors by replacing battery
First published by Maurice on 09/07/06 03:14 PM:
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Subject: Re: Hard drive issues on a P133
Date: Thu, 7 Sep 2006 15:14:53 -0400
Keywords: cmos battery check battery replacement,bios does not
retain cmos settings,bios will not hold cmos settings,erratic
behavior at startup,cmos - bios battery replacement
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microsoft.public.win98.gen_discussion:812882
Try this, if you have checked and/or replaced the cmos battery, or if you haven't yet (regarding "coin" style batteries):
- 1. With the computer off, open case, locate the battery, put your finger lightly on the cmos battery, spin the battery back and forth a few times. (this may be enough to fix the problem, though the below is recommended)
- 2. Look for any "blue" color on the battery while turning the battery. (Brown if you smoke or in a hostile environment)
- 3. If any color shows (or to negate potential issues), pull the battery carefully out of it's enclosure (make note of battery + and - positioning). If it appears to be completely encased or unable to be removed, contact the board manufacturer or the book for the computer/motherboard for how to replace the battery (good idea to familiarize yourself with this recommended procedure even if obviously removable).
- 4. Wipe the battery vigorously between your fingers with a clean cotton cloth (mildly abrasive; like old t-shirt material) with de-natured alcohol. Dry the battery with another piece or section of the cloth, rubbing vigorously.
- 5. Carefully clean the contacts for the battery (on the mobo) using a Q-Tip or like, with a small amount of de-natured alcohol (barely moist). If brown color appears on end, repeat with clean moistened Q-Tip or like, until no color appears.
- 6. Carefully wipe the contacts again with dry Q-tip or like (spinning the Q-Tip for mild abrasion). Make absolutely sure no cotton threads are left behind.
- 7. Blow air across the area which you just treated to dry out any remaining moisture/alcohol, if no "can air", allow a few minutes to dry. Make sure you replace the battery in the same way it was when pulled (+/ -).
- 8. Spin the battery carefully to ensure it is "seated" with good contact. If battery appears excessively loose, remove battery and either carefully bend the top connection by pushing lightly on it with your finger, or (if possible) lightly pull up the bottom connection with something like tweezers.
- 9. THEN follow SRTSP (check all cables, power supply connections, video card, ribbons, other cards, other connections, etc.), close case, check/reset all bios/cmos settings, set "force reset of ESCD". Save settings and exit. Might want to disable bios shadow and/or cacheable for first reset, then go back into bios and enable again.
- 10. If computer starts go to SAFE mode first (if Windows installed) and check Device manager for any problem/double devices. Make note of what is indicated, and remove them. Restart into normal mode, reinstall anything needed.
- 11. If Windows is not installed, have your boot disk (with tools) in your floppy in the drive when starting; check the hard drive by using the command "fdisk /status". Make sure it indicates that there is at least one partition and it is active. (Make written Note of what style and/or how many partitions found and size for potential issues).
- 12. Follow installation procedures for the OS.