Well, finally decided to upgrade my backup 1200xl to U1MB. Ordered from Lotharek (less than 2 weeks and it was here, he's definatley improved). Took my time installing (about 2 hours, checked and re-checked every wire and solder joint). However when it came time to turn it on... what I get is in the attached screenshot. No keypresses seem to have any affect (except Reset, which just brings back the same screen). Power cycling just brings the same. Did I screw up the install? Did I get a bad U1MB? Any quick fixes to get this thing going? I'm heart-sick that I may have destroyed my other 1200xl.