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So I decided to pull the old Amiga 500 out and fire it up again. It powered up just fine confirming I have a 3.1 rom chip installed and after booting to WB1.3 I confirm almost 8mb ram. Great. Power it off. Connect my GVP Impact Series II A500HD+, turn it on by itself and it powers up, platters spinning. Turn it off wait for HDD to go silent. Power the amiga and GVP up at the same time. Amiga does not boot. Caps lock comes on then goes off, no power or activity light shown. GVP powers up just like before. Power everything off, disconnect GVP, boot up amiga to the WB3.1 insert floppy screen again. Seems fine. I remove all ram from the gvp and reset the jumpers to their no mem setting. Reconnect, same thing. Amiga does not boot, it does power on but the power light and activity light do not stay on. I only know it is on by tapping the caps lock key and seeing the light go on and off. Rinse and repeat. It was working when I packed it away. At least I recall it was working. Any tips, known issues, possible part replacement? What about this foot note I found on this website? Would that make sense of this was all working at some point? And where do I find the info about a trace cut? I used to do the cpu removal and replace trace cuts back in the day for the additional ram so I'm not afraid to do another HW project. "problems may arise with the combination of A500, 8372A Agnus and an internal memory expansion with CPU or Gary adaptor - a trace has to be cut to solve the problem" Source:http://amiga.resource.cx/exp/impact500mk2 User Manual: https://computerarchive.org/files/comp/hardware/amiga/GVP_Impact_Series_II_A500_HD_Users_Guide.pdf