I have a faulty HP8903A. Despite the excellent Agilent manual archive, and
other sources that I am aware of – I cannot find any source for the Service
Manual – can anybody help ? The unit starts up and displays all digits as with
the normal “self check”, but stops dead at this stage. All voltages would
appear to be normal. It has a sequence of four yellow LED’s on the Processor
PCB, which are active – but what is the ‘normal’ state for these. This is not
an easy unit to access without the vertical series of PCB’s without extenders –
any help would be much appreciated.
Thanks
Roy
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