Instruction manuals for acer computers can be downloaded at http://support.acer-euro.com/documents/manuals.html. If the manual isn't there then there is a customer help/technical support line on 0870 607 1215 who may help you with specific problems pertaining to specific models.
If you wish to contact acer then the contact details are listed below:-
Any acer manuals available directly through the Instruction Manuals UK website are listed below.
Spare parts for acer machines are available from:-