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August 22nd, 2022 10:00

Optiplex 780 MT CMOS battery

Hello. I made a stupid mistake and broke the CMOS battery emplacement so that battery won't stay in place. I have tried to work this around with some adhesive tape for now but could you please suggest a more permanent solution? See attached image. 

CMOS BATTERY.jpg

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12.2K Posts

August 22nd, 2022 10:00

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August 22nd, 2022 23:00

@Margaritis 

requires careful de soldering then removal of solder from the holes then re soldering a new holder.

Cost of the tools and solder is enough for a lifetime but just replacing the motherboard may be an easier option if you are not skilled at this repair.

multiple tools invovledmultiple tools invovled

August 23rd, 2022 10:00

I would like to thank you both for your suggestions.

I am not good at all with soldering so the workaround shown in the youtube video by redxps630 seems to be the most tangible solution for me. However, as shown in the image below from the video it looks like the CMOS battery has been glued to the gpu heatsink! I even uploaded a comment so as to confirm this.

Maybe I can affix it myself on the part of the pcb lying between the original battery holder and the back of the motherborad using some thermal adhesive tape - there seems to be enough free space to do this.

Margaritis_0-1661274259321.png

Replacing the motherboard with another one is not a bad thought either, I have traced them on ebay for approx USD 40 shipping included. But given that current mobo is working fine for the moment I would like to try the youtube video option first and see what happens...

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