On Friday, 11 April, 2025, Peter Alefounder wrote
> Petyr B said:
> > Sounds like your card is on the way out to me
>
> Could be, but how does it know when to cut out?
> On startup, everything is normal until the login
> screen should appear.
At a guess, the current consumption of the CPU and
GPU rises at that point, as X or Wayland switches
to a higher resolution mode. If there's a poor
contact in one of the power lines, it could cause
the voltage to sag.
> Bob Dunlop said
> > Could be a simple loose connection, they can
> > creep back and forth with time and
> > temperature,
>
> I will investigate that. There is no graphics
> card, but I check things generally.
I would look in particular at the power
connections to the board - the large ATX
connector, and the smaller ATX12V one. If the
power cables plug in to the PSU, check that end as
well.
> There is an old hard disk which I have been
> unable to use
...
> I am thinking I should disconnect the old disk,
Definitely disconnect anything that's not
necessary to boot, if only to rule it out. Remove
the power from that old disk as well.
If the connectors seem well seated and the
problem remains with the old drive disconnected,
my suspicion would then fall on the power supply.
If you have a spare unit, it might be worth using
it to power to board temporarily as an experiment.
However, it could also be a marginal contact in
the processor socket, or one of the memory
sockets. This sounds like a temperature/expansion
related problem, and they are not easy to
diagnose.
Nick.
--
Nick Chalk ................. once a Radio Designer
Confidence is failing to understand the problem.
--
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