HP41 CL Board installation

[Neve]

(11-15-2017 08:07 AM)Benoit Maag Wrote:  I got my V5 board last week

The 41C I wanted to install it into was an older machine (S/N 2036A01297), which has 2 metal nuts holding down the motherboard onto the display/keyboard PCB (see picture). The metal nuts screw directly onto the plastic screw posts - needless to say the thread on the plastic posts is easily damaged.

That is what happened to me. When I screwed the nuts back to hold the 41CL board, they did not press it enough to make contact with the display/keyboard PCB, and I could not get the 41CL to work.

And the result is an unbelievable machine...

Mine is serial #2027A00688, and the nuts screwed back on perfectly without any damage to the threads. The only problem I encountered was that the previous owner had lightly glued the battery connector to the front case. I guess I could somehow remove it, but I’m afraid to damage it. The two sides lift up a bit, but the middle is quite stuck.
So my problem was that I plugged the serial connector to the board first. Then I realized I couldn’t push it to the front because the battery connector was it the way and couldn’t be removed. So I had to desolder the wires from the plug. Also there is still a little bulge on the side where the wire are running along the case (I forgot the double tape). That might solve this issue...
Other than that, everything is perfect. Although I may finally fit the V5 board onto another machine and sell this one, because the display contrast is lower than my other Fullnut CX model. There is really a big difference, which is particularly annoying in low light conditions. So I haven’t put the CL sticker on yet until I decide to get a CV or a later model (non-tallkey) 41C with better screen contrast.