HP-28S: Key press problem

[beerlim]

(07-25-2017 01:36 AM)Jlouis Wrote:  [quote='beerlim' pid='76485' dateline='1500893921']
On my 28S I have the following issue.
During the keyboard test I noticed that the whole row 'Y' to '(' and 'EVAL' to '-' are not responsive at all.


I had this problem in my 28s. It is fixable, but you have to open the calculator and change some heat stakes. As I was not secure if I could do the job, so I send mine to an expert in HP, he did the fix and gave me back with a perfect battery door , for the original was already broken!

There are tutorials for fix this problem, I'm not sure in the old forum or find a good repair expert in HP. Is Fixthatcalc still active?

Edit: I forgot to mention, the fix did not affected the exterior of the calculator, it is like new now, perfect. The 28s is one of my preferred calculator, due its former factor and the alpha keyboard, very useful and elegant. The only thing is that HP could have made it with the alpha keyboard on the right side, as some Sharps.

I know I have to open it, the question is how and with pictures. I did find a post but the pictures were gone and just with the text I won't be able to do it.
Does anyone know on how to open the 28C or 28S? Picture instructions.