Information kindly supplied by Asteroid
If you are looking to get one of these make sure you get the mouse (9 pin minidin connector) with the unit, as this is unique to Acorn computers and very hard and expensive to replace, and the computer is useless without it!!
CMOS batteries like many classic computers can leak with age, so check once
a year that the soldered in coin battery on the bottom left of the motherboard has
not leaked, if it has clean off any green crud with tissue and alcohol and consider
purchasing and soldering in a new battery soon.
Open the case carefully!! The 3 clips on the front will break if you are too brutal
dismantling the machine! These should be prised gently with a large screwdriver before lifting the lid off.
Security markings are often on these computers, as British schools have a problem
with theft of their IT equipment, I have found several grades of sandpaper removes
ugly scratched on markings with little or no damage to the case.
If the machine refuses to boot, clear the NVRAM by booting holding down Del until
the screen goes red, making the machine boot to the desktop (you need to reset
time and date settings) as crashes or a corrupt screen caused by corrupt NVRAM
could easily mistaken for a serious problem with the motherboard. Amercian/Japan
users you can import and use one of these machines!! Undoing the metal or
cardboard casing around the power supply reveals a hidden voltage switch so you can run the computer at 110 volts!