The Acorn A4 motherboard is about 10cm x 30cm, and is buried in the depths of the machine. You have to remove every single component of the machine to get at the motherboard. To make life easier when diagnosing faults I've scanned it with a flatbed scanner and the pictures are here - so there's no need to take your machine to bits to look at something.
![[Bottom of A4 board]](img/mbbottom/369x842.jpg)
(serial port is at the bottom left). 150 dpi (174K), 300 dpi (1.4MB).
![[Top of A4 board]](img/mbtop/288x842.jpg)
(serial port is at the bottom right). 150 dpi (122K), 300 dpi (1.0MB).
Page by Theo Markettos (email at theo@markettos.org.uk), autogenerated 18 September 2003
Return to Theo's A4 pages.
