286 Does not hold BIOS settings \ VOGONS

286 Does not hold BIOS settings

Topic actions

Post a reply

First post, by therevisiona

Posted on 2020-05-21, 12:22

therevisiona Offline

Rank Newbie

Rank: Newbie
Posts: 67
Joined: 2020-05-15, 15:11
Location: Czech Republic

Hello, my 286 board will not hold the BIOS settings. I replaced the 3.6V battery as it was leaking, with a CR2032 and a diode. The system still displays "CMOS Checksum Error" when it boots up. I also tried the external battery connector, did not do anything. However, when I remove the battery, It will say "Battery State Low" and "CMOS Display Type Mismatch". Anybody got any ideas why it wont work?

Reply 1 of 1, by quicknick

Posted on 2020-05-21, 12:36

quicknick Offline

Rank Oldbie

Rank: Oldbie
Posts: 634
Joined: 2017-10-30, 23:53
Location: RO

Probably the voltage is too low. 3V from the CR2032 is equivalent to the "fully discharged" voltage of the NiMH pack, and you also lose ~200mV on the diode.

For the external battery connector, many boards require 4.5 or even 6 volts. You can try with 3xAAA or 4xAAA / 2xCR2032 packs.

Go to top of page Go to top of page

Back to General Old Hardware

Main menu

Common searches