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No Power In Calculator Repaired

By on May 28, 2022
No Power In Calculator Repaired







how to fix calculator

Friend of mine in our housing society gave me this calculator to fix.
I checked by pressing ON/AC Button but no digits visible on the screen.
Hence I opened the calculator by removing two screws from the back side for visual inspection. I found here…..metal battery holder cover is hanging on the PCB.

fixing calculator

So I took it on my workbench for repair……..

how to fix a broken calculator

So first of all I have to make patch on this damaged trace so that it can hold the metal cover with pressure while battery is inserted.

Arranged one BMS circuit of laptop’s damaged battery from my junk box which have wide copper strip soldered on battery cell.

bms battery cell

I cut this copper end and patched on damaged trace on the PCB.

how to repair a broken calculator

Soldered copper strip patch over the damaged area and soldered battery holder metal cap on it.

fixing a bad calculator

how to fix and repair calculator no power

Inserted the Battery under the cap……. & checked calculator is back to the life.

servicing a calculator

yogesh panchal

This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India. 

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Note: You can check his previous repair articles on Canon LBP 2900 Printer Repaired




  1. Parasuraman S

    May 28, 2022 at 11:12 pm

    A very calculated patch work on a calculator! Well done! It is not what we repair that matters, the thrill we get when we accomplish!

    • Yogesh Panchal

      May 30, 2022 at 3:24 pm

      Absolutely right Sir.

  2. Imoudu.O

    May 28, 2022 at 11:16 pm

    Good good good!!!.Most people would have thrown such devise away,but you resuscitate it and save our oceans from e-waste.Thanks for sharing.

    • Yogesh Panchal

      May 30, 2022 at 3:44 pm

      Thanks! If we have skill to revive the equipment just repair it rather throw it away & give it to some body who need it.

  3. Albert van Bemmelen

    May 29, 2022 at 1:33 am

    Nicely patched up fix! Pro job!

    • Yogesh Panchal

      May 30, 2022 at 3:47 pm

      Thanks! Albert

      Practice always improve the skill & our mind is also prepared ready for any challenge.

  4. Lynn Blakely

    May 30, 2022 at 6:40 am

    Dear Yogesh: Well done Thanks for the detailed pictures and dialogue.

  5. Waleed Rishmawi

    May 30, 2022 at 7:34 pm

    I like the soldering joint you made, it looks very solid and a job well done.

  6. Humberto

    July 1, 2022 at 10:50 pm

    Thanks for sharing this article.


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