First post, by vetz
I just got hold of a 430HX and 430FX board. The 430HX board has a compatible BENCHMARQ3287 / DALLAS 12887 / ODIN 12C887 RTC onboard. When I booted it up settings were set to default and the year was 2009. I entered the current date and switched some settings before I rebooted. I enter the BIOS again and see the date is saved, but my settings are not. I guess the battery is failing and the voltage is barely enough to keep the clock running while not being able to save any settings in the CMOS RAM. If there is any other reasons behind this behavior, please let me know!
Anyway, since the 430FX board is missing it's RTC chip I unplug it from the HX board and plug it in the FX board(manual says it requires a Dallas compatible RTC, which I guess will work with any 5V 18pin RTC???). Nothing happens when I try to boot the FX board (except the 3 lights on the keyboard blinking when power is turned on). I try replugging it into my 430HX board and now it is completely dead. Won't even boot (keyboard blinks though).
1. Will an old motherboard not boot if the RTC battery is completely dead?
2. Did my swap of the RTC chip kill any remaining voltage, or did I fry something because of compatibility issues?
3. I'll probably buy some new RTC chips from Ebay as they are 4 dollars a piece with shipping from China:
This is the chip that came with the 430HX board:
http://www.ebay.com/itm/1-piece-M48T86PC1-IC- … Y-/300864180914
The manual says BENCHMARQ3287 / DALLAS 12887 / ODIN 12C887 will work, so then I guess this chip will work as an replacement? Please notice that there are missing some pins:
http://www.ebay.co.uk/itm/IC-MAXIM-DALLAS-DIP … =item3a705e08dc