Psion Series 3mx

Psion Series 3mx

The Psion Series 3mx was the last model in the Series 3 line, launched in mid 1998, and is an upgrad to the Series 3c. The main differences are: a silver metallic finish, a CR2025 backup battery, and a faster processor, the 16 bit NEC V30MX (80C86 compatible) running at 27.684 MHz. It has a backlight like the later models of the Series 3c.

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Psion Series 3mx SSD door microswitch repair

I recently bought a Psion Series 3mx on eBay but found it didn’t recognise SSDs inserted in either A or B slots and suspected a motherboard fault. Having found a cheap 3mx to test this, and checking that it did indeed read SSDs OK, after swapping the motherboard it didn’t help. Not only that but it also failed in the same back in the original machine.

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