It never got to the Blue screen, just stayed black
Anyway, i bought another modern shape C64 - a C64c and swapped the motherboards around as the broken one was in good nic + box etc etc.
Was amused to notice how the C64c's mboard is way smaller than the other C64, and was of GS proportions. Although i think C= were a bunch of cheapskates to replace the aluminium inner case with cardboard!!!