Off topic slightly...
My card is fine, but every now and again, it just needs reflashing.
It's a curious cycle. Fine for weeks (or months) then it might need reflashing several times on successive days.
Stranger still, occasionally I can't reflash it with the final version I use (the last pre-grexx one) as sector 0 is locked, implying the old contents are still there.
The behaviour is similar to that you get when disabling the card by pressing the '2' key. However, to re-enable the card you need the CTRL-LAMIGA-RAMIGA combination for 10 seconds. My PC keyboard adaptor does not do this, signalling /KBRESET for no longer than 0.5 seconds.
I really need to wire up my front panel's reset button to the test pad on the motherboard that does /KBRESET. Lazy beggar that I am...