Cleaning with an erasure, especially a pencil type (versus ink) can leave a different residue and doesn't always take away the material very well. It is best to use an actual electrical contact cleaner, usually found available in spray cans. Most electronic suppliers cell it or, if desperate, Radio Shack here in the states usually caries it.
The other issue that I have seen has to do with contact 'mismatch'. If you have tin plated type contacts (silver colored), it is best to use this on both the memory and the connector. Gold plated should also be mated with the same. This helps avoid some additional reaction that may happen.
By the way, a vertical stripe pattern would indicate to me (assuming that the video uses the system memory for the frame buffer) that there is most likely an address bit that is not making good contact. I suspect that the real contact cleaner may help this, since reseating the memory seems to help.
Cheers, jim
On Feb 18, 2004, at 8:20 PM, Timothy Swenson wrote:
I don't remember if I've brought this up before, but I've got this one problem with my Q40.
Every now and again when it boots up, the screen if full of pretty lines running down the screen. I've found that if I pull out the memory and reseat it, the Q40 boots right up. With the one case I have it takes a couple of minutes to get the case off. I have found that giving the case a good whack the Q40 will boot up just fine.
I'm guessing it's an age thing with the contacts on the memory boards. I've cleaned them with an eraser (rubber for those in the UK) and it does not really seem to help.
Anyone have any suggestions (other than just keep whacking away).
Thanks
Tim Swenson
