Permanent solution (without disassembling anything): the same thing happened to me, what I did was wash, without disassembling the calculator, with abundant isopropyl alcohol, that does not damage the electronics, it only cleans it, injecting the liquid through the keys closest to the screen . The problem is that the screen and keyboard contacts are in that area, with accumulated dust and dirt, the contact does not work well. I repaired my calculator yesterday December 02, 2020, at least it worked for me. Good look, thanks for you video.

I was about to give up on my HP 48GX that I used to get my engineering degree way back in '96, until this video...THANK YOU!

Thanks a lot! I was upset that my 48 had passes away! Thanks to tour video, i could bring it back to life!

Thank you much. I was about to buy a new calculator, but decided to search for "HP 48GX fix". Glad Google brought me here! Thanks again.

Totally impressed!! This fixed my problem and I sure didn't want to get rid of the calculator that got me through EE classes in 1987 thru passing my PE exam!!

Thank you very very much. I've had this calculator since 1991 and the last time I got it to turn on was at least 15 years ago. I was about to trash it. I'm so glad I did not. You are the best!

SIR: you saved my calculator! I had that exact issue. 2 strong rubber bands did the trick. Thank you so much. I was missing my “polonaise inverse” calculation system! Almost opened it but it looks like it is a very delicate surgery . Cheers.

I HAVE 2 48'S I USE AT THE OFFICE. ONE QUIT WORKING SO I WRAPPED A RUBBER BAND AROUND IT SO I WOULD STOP PICKING UP THE BROKEN ONE. AFTER WATCHING THIS VIDEO I ONLY HAD TO DOUBLE UP THE RUBBER BAND I ALL READY HAD PLACED ON IT, AND BAM, BACK IN BUSINESS. THANK YOU SO MUCH FOR POSTING THE VIDEO.

Thank you so much. I've been using my HP for 20 years now and I just can't (don't want to) work on "normal" calculators any more.

Awesome! Thanks. You turned my tears of sorrow, into tears of joy!

Thanks! my 48gx returned to life after almost a decade later. A memory from my college years is back to life.

Thank you for sharing this video. I’ve been accumulating older HP and TI calculators as a bit of nostalgia and wasting money. I recently bought an HP 22s, which appears to be in perfect condition, but the right column buttons don’t work. Once again I bought something with problems 😖. Luckily I stumbled on to your video and tried the trick. It worked 👍

Thanks! My HP48G have been out of comission for a year - and its only 24'ish years old. I've missed it like an old firend, and now its back =) Amazing what a little bit of pressure in just the right spot can do.

Thanks a LOT, my companion of 20 years is alive! My ON button is lower than the rest, I thought it was damaged when the calculator was stored with all my household stuff for 2 years, but just touching the area above the C button sorts it out, I never thought of that!

I can't believe it, it's working!! It hasn't worked for years and I couldn't bare throwing it (my favorite calculator) out. Thanks!

Thank you so much, you just saved my 23 year old 48gx...

I've been dealing with this issue for several years! Now I know how to fix it - thanks! I've got my unit engraved, and I was dreading giving it up for another 48G... sounds like I might have had the exact same problem all over again with another unit, anyway.

There were times when my arithmetic keys didn't work and times when they did work! It almost seemed like the time of day had something to do with it! Resets using the keyboard and the R button didn't help! And, then lo and behold, as suggested by this video, pressing the calculator face below the screen turned on the arithmetic keys. Amazing!

Thank you for the great tip!! I love my HP 48G for everyday calculations and have had it since 1996. Recently the on/off button had stopped working properly, but by applying the pressure to the faceplate as you said, its working again. Thanks and I hope I can get another 26 years out of this calculator. It's the best! Thanks again!

Amazing easy way of fixing the HP I thought it was lost, had it in may drawer for the last 12 months. Thanks!!!

WOW! Thank You; worked great, so now I don't have to look for a replacement! Don't know how you discovered this quirk (and a solution for it) but I'm very glad you did Tnx again!

Thanks, I was searching online for a replacement, and now I don't need one.

Thanks for this video, my 48 is 30 years old and now back to using the 3-key!

Hi, my HP48G buttons 4,1,0, dot, spc and + was not working at all. I did what you done and it worked like a magic. Perhaps there is a lot of small parts with electrical contact problems inside the calculator. Thank you a lot for this video!!!

That solved my problem.👍 Thank you 🤗 You can also use an electric contact spray from Displysite. Now I don't need the rubberband anymore Sven

Awesome! My +/-/x keys stopped working a few weeks ago....your fix works like a charm.

That helped a lot. I've got a stack of 6 48's that didn't work before I saw this. Now it's only 2. I really don't understand the "dislikes." Either you knew this about the 48 or you didn't. If you did, so what? If you didn't, you learned something useful in 2 minutes. Get a grip, dislikers!

Wow! this brought my 48SX from 1990 back to life. Thanks!

I had a hard time believing that this would work ..... but it seems to do the trick ! Thanks very much.

Worked for me also! Thanks a lot! I am lost without my old 48 GX!

Hilarious that mine just started doing this about a few months ago and I started to look for a replacement but they are still $200 + on ebay, this solution solved my issues 100% (I was having the same problem and also with the upper row right most 2 keys). I'm pretty sure I bought this calculator new in 1996. What a beast!

Thank you very much, my 48gx is alive again!!!

wow. thanks. That's the exact issue I was having and applying pressure makes it work. Thanks again.

Dude you're a genius. I was close to throwing mine away. Now it works perfectly. Thx ;)

Thanks a lot!! It saved my HP 48 GX!! (I had the same problem, I could not use the 'on' button)

Fixed my 48g+ with this simple hint! Thank you so much!

I was ready to throw mine out. Looks like there is still some hope for it!!!! Thanks for posting!!!

Thank you, thank you, thank you! the pressure in the area below the screen did the trick.

Oh man, you rock! I was almost give up. Thanks for sharing. Regards, Marcelo from Argentina

I like to use a small Irwin Quick-Grip clamp. Easy to adjust the pressure.

Thanks for making this video! My calculator is 26 years old and it's just started doing that!

Also possible to press both sides around soft keys until it works, and glue with superglue. Fixed it for me.

just went to use mine and found I had an issue.. a little grab and twist and now its fine!! thanks for the info

Thanks for this. I'll watch for this on my calc!

Your the best. Back to life.

thank you !!!! was ready to give up, good as new

Incredible!!!!! Thanks so much. So stupid problem on this great machine

Another fix, is to just cram some EP foam into the unused slot, and push it down with something.

Thank you! Problem solved, I can use my 48G again

Great Tip! Long years ago I had 48SX & 48GX, both died because of "Keyboard". Were you are pressing there is the Contact between Display and Circuit. It's made by a small piece of Rubberband. Rubber gets harder in time. A Mixture of 50% - Acetic Acid CH3COOH 30-(80)% and Spiritus C2H5OH 100% makes Rubber soft again. I GUESS, only 2 drops of that Mixture between Glas / Metalcover will run onto the Rubber produces acrid fumes and might force the Rubber back in support of its inherent electrical Contacts. Damage is scarcely to be expected because of nearly no Water and no Oil in the Mixture. But I have no HP 48. Perhaps someone likes to test it.

Thank you! I thought my old 48GX-ASEE ed. had bitten the dust. I may look inside to see if I can find a good place for a piece of foam to maintain the display contact.

Thank you so much! I was very sad that the B C E and operator buttons of my 48G+ wasn't working anymore...

Thank you so much!!!! I love this calculator and i didnt know how to fix it. You helped me a lot.

Thanks for the Video. It was very helpful. I also own a HP48 and have the same problem Thank you so much

This cured my ON button problem. Light pressure is all it takes. All the other buttons were working except my ON button. BTW the android application called DROID48 is an excellent emulation of the 48G. It's great to always have an RPN calculator handy. Can't use algebraic!!

Brilliant! Thank you. I thought my calculator was a gonner.

Great - I was struggling to switch it on, now fixed Thanks

thanks one of mine 48sx lost the on off function after 22year

damn youtube, I love you. That totally freaking worked. Now, does anyone have any idea how to fix this permanently (without the ghetto-looking rubber band around my HP 48GX)? This calculator is a work of art and gives me such pleasure using it, but would be diminished with the rubber band. Currently just a slight press in that area cures the problem for a bit. Might just take this in to an electronics repair store... :/

Merci beaucoup, super astuce!

The fix is to open the calculator an re solder the contacts, solder breaks through time.

No way! Thanks. Everything is on you tube.

This is Xena, the Warrior Princess's calculator.

Thank you! I got my calc back!

Thank you!! This is a great video. Anyone know how to disassemble the calculator in order to permanently fix it?

funny I've been doing same thing for at least 5 years now and meaning to take it apart and reflow the old solder joints to fix it properly

Gracias por la ayuda... Excelente !!! Recuperé mi HP48...

Thank you so much! It's working again!

Amazing and good hack! It was the problem with my machine! lol

This saved my ass! Thank you SO much !

ótimo, recuperei minha HP48.

Thank you, Fixed mine... wonder what permanent fix is

Amazing! Thought I was gonna have to crack it open - huzzah and thanks!

You're a genius

Mine wasn't quite a bad, just the power key wasn't work. Happy to be able to keep it though.

It also worked for me but I replaced the rubber band with scotch tape.

Many many thanks!

genius ! Thank you sir.

Yes ! thank you so much

Thank you dude!!!! YOU GOOOOOO!!!!!!!

Thanks! Worked fine for me

increíble, funcionó! gracias!

Thank you very much

Did the work. Thanks!

This has worked for the past 5 years. But the problem got worse now. Anybody knows for a hardcore solution (not involving buying another)?

Excelent!!! I got calculator again!!!

Very helpful.

Thank you it works great thanks to your video.

I''ve got the same problem with mine, after 15 years sleeping it's very strange is someone try to open it to understand, it's very stange i'have to pass exam in few months & want to use it

That saved my day, Cheers!

thanks. nice fix.

THANK YOU !!!!!!!

THANK YOU

Gracias por la ayuda.

cool. thanks!!!!

THANKS...DUDE

Worked! TY!

Mines trying to work. That seems to def be the problem though, can the rubber be replaced? Anyone?

Does anybody know what to do when just the shift buttons don’t work?

Wow, that worked! Anyone have an issue with a darkened screen?