|Re: Problem with 48GII|
Message #2 Posted by Vieira, Luiz C. (Brazil) on 18 July 2004, 11:46 a.m.,
in response to message #1 by Iqbal
Hi, Iqbal! Are you well?
I'm curious: how many times did it happen? Or how often does this KBD weirdness happen?
I'm asking about this because I was requested by a student to try to repair an HP20S (Pioneer) where the [INPUT], [+/-], [(], [)] and [<-] row no longer works. I "gently" tried squeezing and twisting the case closer to the "zebra" contact that connects the keyboard flex contacts to the main PCB, and I succeed making the [<-] work once. But I didn't think of resetting the calculator or leave it without batteries. I once had an HP42 with sort of a "bad behavior" with the keyboard: without the back half case it worked fine, but no key worked after putting the back case in place. I had to add some thin foam fastener below the zebra contacts to ensure it would "touch" the mainboard contacts.
What I wonder is about the possibility of the batteries compartment being right below the keyboard/main PCB contacts. In the HP48/49, the batteries compartment was in the bottom of the calculator case, now the HP49G+ (I'm not sure about the HP48GII) has it in the top, opposed to the earlier models. Would removing/replacing batteries somehow "shake" these contacts and cause them to work /not work? My HP49G+ works perfectly fine since I got it, but your concerns and your HP48GII behavior must be considered as well.
I'd wait for a while and observe. If the calculator is new and you still can do that, ask for a new unit. If everyone does it, HP will surely (probably???) do something to avoid replacing defective units by enhancing quality... should we expect so?
Cheers and best regards.
Edited: 18 July 2004, 11:48 a.m.