Chaintech motherboard help

nikkigreg1974

I have a Chaintech motherboard model # 5IGM M102. It's socket 7 motherboard. It has a real time clock is what keeps time and the setting. There no cmos battery on the motherboard. When i start the computer up all the settings in the bios are wipe clean now. I can reset bios bios but after i turn the computer off the bios are wipe clean again. The way i under stand real time clock is it has a rechargeable battery built into it to keep all the setting for the bios and as the computer runs it charges the battery. But mind seems not to be charging. I left it on for a hour and nothing . Has anyone ran into this problem and know how to maybe get the thing to keep it's setting? There no place to even plug a battery on the motherboard. Thanks for the help.

jamie1130

Does the board have a chip such as a Dallas clock chip? I can't find anything on that model online.

nikkigreg1974

chip not a dallas clock chip but it's a clock chip made by other company. I don't have the motherboard with me right not. That model is hard to find online. All i found was a bios update and a manual for the pinouts. that company is out of business now. if you just look up 5IGM motherboards you can find a few thing. like this http://stason.org/TULARC/pc/motherboard ... GM0-3.html Well thanks for the help so far.

altracker9

I had a similar problem with my Acer Acros 9130. It would not maintain the bios settings and there was no obvious cmos battery.
After some investigation, I found that the battery was part of the DALLAS DS12887A RTC chip. On the Acer board, the chip was socketed, so replacing it was not difficult. I was able to buy a new replacement chip from Digikey. Replacing this chip restored the PC Bios to complete working order.

So, you need to check you motherboard for the RTC chip. It should be close to the System Bios chip.
If you can find it, the problem then boils down to finding a new replacement.

Icon

If your board is using a RTC chip, there is no alternative. You either have to de-solder the chip if it is directly soldered to the motherboard, or simply pull out the old chip, and replace it with Dallas DS12887A, if it's socketed. These chips are still available from Maxim Integrated. If your chip is directly soldered and don't have the proper tools, you can try modifying the chip by wiring an external CR2032 battery and battery holder to it. Don't try to remove the battery from the module, it's encased in resin epoxy.

You can try the hack method found in these two links:
http://www.mcamafia.de/mcapage0/dsrework.htm
http://www.classic-computers.org.nz/blo ... y-chip.htm

nikkigreg1974

ok I got 4 other socket 7 motherboards with the same real clock chip on them. I see if they will work. Thanks for the help.