The Museum of HP Calculators
Repairing It Yourself
Disassembling HPs.(brief instructions for most models)
HP 9810/9820 Card Reader Drive Wheel Repair
- Classic Series (HP-35, 45, 46, 55, 65, 67, 70, 80, 81, 91, 92 97)
A Common Woodstock Problem and Repair Suggestions
HP-19C printer overhaul discoveries
Spice Service Tips (HP-31E, 32E, 33E/C, 34C, 37E, 38E/C)
- HP-41 Series and Peripherals
ElectroStatic Discharge: a possible solution for the HP48
Opening a Voyager (HP-10C, 11C, 12C, 15C, 16C)
- For parts or manuals, try HP at: (800) 227-8164 or try the classified ads.
- For more help, try the HP Forum.
Having Someone Else Repair It
If you need someone to make repairs for you, you can try:
- Don Orourke at International Calculator in Florida at 407-671-1991 or INTLCALC@AOL.COM repairs HP-41Cs and HP82104A card readers, as well as chargers and batteries. He also has HP-41s for sale along with software and peripherals.
- Randy Sloyer at www.fixthatcalc.com for repairs on most HPs made in the last 20 years or so. However, Randy's site says that he is having health issues and not accepting new work at this time.
- For calculators that are still under warranty, please contact HP.
For battery work specifically, you can also try:
- Mark Hoskins at Waterhosko@aol.com or 630-372-7656 repairs/sells/rebuilds Classic batteries and 4-cell subC HP battery packs.
The Battery Station Has a good variety of batteries at good prices.
- Batteries Plus. Many U.S. locations including: Arizona at 800-677-8278 and South Dakota at 800-362-9833. Battery pacs are sometimes repaired while you wait. A recent repair of an HP-41C pac cost $12.
- Battery Works at 800-707-7000
- International Calculator Sales in Florida at 407-671-1991 or INTLCALC@AOL.COM.
- TNR Technical Inc at (800) 490-8418
- Mille Et Une Piles at 34 rue Delambre, 75014 Paris, France
- Hobby stores such as Tower Hobbies and Horizon Hobby often have extensive catalogs of batteries.
The Museum has not used any these services and can't recommend one over the others.
Go back to the main exhibit hall