View Full Version : PC/AT 5170 Setup 152 error

July 25th, 2006, 07:47 AM
I have an IBM PC/AT with a flakey MB, gives a 152 error when running
the setup which indicates a problem with the CMOS chip.
The Setup disk boots okay, but when asked for date/time
info gives the 152 System Board error.

It appears that battery acid may have caused some damage
to the chip U117-MC146818, or to the lands around the chip.
There is green corrosion on the pins of the CMOS chip and a few
other small components.

I might try checking the lands with an ohmmeter and/or replacing
the CMOS chip. Anyone have any experience with the 152 error ?
Or with replacing the CMOS chip ?


July 26th, 2006, 02:27 AM
You don't mention whether the acid is from the currently fitted battery, or from some past battery.
I'm assuming based on the technical slant of your post that the current battery is good.

If the acid/corrosion is bridging pins of the CMOS chip (or any component), or bridging tracks, then that could be the cause of the problem (ie. partial shorting). Remove all acid/corrosion.

Several motherboards I've seen had acid in such quantity and left for so long that the acid ended up eating completely through one or more copper tracks. And so using that ohmmeter is a good idea.