Hi I inherited a 42S and it switches off imediately after switching on. In some cases the display will flash for a split second, in other cases it doesn't show anything. If I press the ON key fast enough I can keep the display on until I release the key.
The self test (ON-LOG) works just fine, and passes OK. But at the end it just switches off. ON-ROOT (the reset function?) works and very briefly display "Machine Reset"
I can even adjust the contrast, and even get it to do calculations if I press a key fast enough at power on, but it switches back off again as before.
Anyone know what is wrong? Is there any higher level reset function I can try?
The batteries are brand new and tested.