RB750G failure

Guys,

3 months ago I took delivery of couple rb750g.

1 is deployed (yeek)

The second is a redundant spare.

It hasnt been used for a couple of months, now I plugged supply in and every LED lights. ALL ports!

The NIC on the PC shows a cross (cable unplugged error) on every port. I read about Port 1 and that seems inactive too.

I have held the reset button in whilst booting, but the NIC still seems inactive.

I haven’t yet configured Netinstall properly(anticipating a rebuild), but surely Port1 should at least appear functional.

Should I persist with the Netinstall attempt or does it sound as though its busted!!

PC. Those heat sinks get mighty hot, you sure this RB is good for ambient temperatures at +40 ???

Has bought new rb 750g
After inclusion shines green PWR and ACT
Lan there is no connection
reset does not help
What to do?