Chris, Thanks for the suggestion...But already looked at that, the keyboard is the old two metal contacts (2mm apart) on the board and a conductive surface under the key type.... No sign of spillage or delay in key returning to normal... I suspect a component fault, but have no idea where to look without a manual... Desperately seeking any 480z or 380z manuals or other information, online, original or photocopy. Rgds Simon -----Original Message----- From: Chris [mailto:mythtech@Mac.com] Sent: 11 October 2001 16:03 To: Classic Computer Subject: RE: Research Machines Information I have seen this happen MANY MANY times with PC keyboards, so maybe my findings apply. In every instance that I have found it, it is beacuse someone spilled either soda or coffee into the keyboard, and the pads were sticking. The key would register when pressed, and then when released, the pad wouldn't pop up right away, instead it would "peel" up, and cause a 2nd (or sometimes a 3rd if it was sticky enough) registration. Opening the keyboard and washing with alcohol or contact cleaner has always fixed it for me. -chris <http://www.mythtech.net> ___________________________________________________________________________ This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of SchlumbergerSema. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please notify the SchlumbergerSema Helpdesk by telephone on +44 (0) 121 627 5600. ___________________________________________________________________________