Home > Uncategorized > Calculator update (further updated)

Calculator update (further updated)

This morning, I decided to see if I could find a way to fix the blanked-out row of LCDs on my calculator, after determining that the batteries weren’t the problem. Looking it up online suggested that there was probably a dirty or broken connection in the ribbon of circuits connecting the display to the circuit board, and that it was theoretically possible but extremely difficult to fix.

Taking the long shot, I unscrewed the back of the calculator again — swapping the old batteries back in while I was at it, since they were still good after all — and tried to spot the problem. Seeing nothing, I just generally tried to fiddle with the connecting ribbon and push any loose connections back into place. I have an old irrigation syringe left over from my orthodontic surgery decades ago (since I’m a bit of a pack rat and I often hold onto things just in case they might prove useful someday), and I used it to puff air under the ribbon in hopes of blowing any dust free. But nothing seemed to make any difference. So I figured I’d done all I could and closed the calculator back up again.

Then, just as a last-ditch, token effort since I had nothing left to lose, I resorted to the ultimate fallback — percussive maintenance. I just tried banging the calculator around in hopes of knocking something back into place.

And it worked!!!

I’m not kidding. It actually restored the display to full function, at least for now. Brute force did the job when delicacy failed. I have no idea if it will hold, but at least I have hope that if the problem does recur, I’ll be able to bang it back into place again. Though hopefully there was just a speck of dust or something that’s now gone, and it’ll be fine. Still, I’ll try to remember to be gentle with the calculator lest something get knocked loose again.

That left the question of what to do with the unnecessary replacement batteries I got. Amazon doesn’t let you return batteries, because they’re technically hazardous materials, but it does allow refunds. I didn’t feel right about getting a refund on perfectly good batteries I still had, but if the calculator had proven irreparable, I might’ve done it anyway. As it is, though, since the calculator is still working (for now), I might still have use for the batteries in the future. So no refund — I just put the batteries back in the pouch they were shipped in, taped it back up with a note saying “For calculator” so I wouldn’t forget, and put the pouch in the closet where I keep my other spare batteries. I figure if the original batteries have lasted for so many years (the manual is copyrighted 2003, apparently the last year this model was sold, so it’s probably about 18 years old), the new ones will keep. Though it’s just as possible that the old batteries will last longer than the calculator.

(Also, if I’d remembered earlier that the manual was still in my drawer, instead of just now when I decided to check the copyright date, then I wouldn’t have had to look online for battery replacement instructions. D’oh!)

EDIT: Well, that didn’t last long. I just tried using the calculator, and the LCDs went out again after a few moments. And no amount of banging was able to fix it this time. So basically forget what I just said an hour ago. Yeesh.

UPDATE 12/10: Turns out I can return batteries after all, as long as they aren’t defective. Since the calculator’s busted and the old batteries are still good, I had no reason to keep the new ones. I just had to print out the shipping and hazardous materials labels, tape them onto the return package, and walk them up to the Amazon pickup/drop-off center a few blocks away. I’ve been notified that my refund has been issued — all five bucks and a penny. Whee!

  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: