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+--- Thread: HP 28 with battery corrosion (/thread-7548.html)
HP 28 with battery corrosion - MattiMark - 01-10-2017 06:30 AM
A friend of mine has gotten battery acid in his HP-28 (forgot the batteries in the calc for just too long) . And it´s just dead when using new batteries. Is there a way to rescues the calc? How can it be opened?
Regards,
Matti
RE: HP 28 with battery corrosion - Paul Dale - 01-10-2017 06:38 AM
If the corrosion isn't too bad, try spraying deoxyit on the contacts.
Opening a 28 is painful -- welded heat stacks need drilling and replacing.
Pauli
RE: HP 28 with battery corrosion - Geoff Quickfall - 01-10-2017 07:45 AM
Agree with Paul!
Try deoxit and some mechanical cleaning with a stiff artist brush that fits into the battery compartment.
Work the brush into the compartment first, shake any debris out, repeat many times. Then introduce a drop deoxit onto a brush and paint the springs with it.
OR
try this :-)
Read the whole posting: Shucking the clam shell