|Re: 50g won't turn on (or, no screen output) !|
Message #8 Posted by Al Snyder on 3 Dec 2007, 3:17 p.m.,
in response to message #5 by Al Snyder
You are right, these machines are not designed to permit easy repairs. One thing I found is that, this one was already opened, and, the aluminum shield was removed. When I removed it again, I found the thermal bond of connectors half way peeled off, towards the tips; but not fully detached. The full length was somewhat still holding tight. I then put a clear tape along the whole length to prevent full detachment, hoping that it would create a better connection. If I were to open it again, I'd cut the shield along the connector, instead of detaching it completely, and leave the upper part glued on the board. This connector is the weakest part of the design. I don't understand why they did not fortify it with the strong red glue that they used around the CPU & the crystal.
The connectors are so tiny that there is no way to solder them one by one. This is a micro (if not nano) technology.
Thank you for the precious info. I printed it, just in case. I tried in vain everything written again and again. Just beeps, no screen output. It seems like the whole thing is working, except the screen output! What a shame.. I think the previous owner used a 48 lib, and having no idea that it was a recoverable error, s/he opened it up.
At this point, I'll keep it for parts, or until complete exploration & remedy ideas of this new design come up. If I ever succeed, I'll post it.
And, yes, I'll get another one this week. I'm planning to write some programs using C language. The 48/49 Advanced User's Manual did not have a word about it. I've seen some links, but would anyone recommend a good source?
In the meanwhile, I'll keep writing programs on my 41-CV too.
Thank you all for your precious input & time.