These important points suggest a very likely possibility his/her hardmod attempt could have ended up hardbricking the motherboard.I must add that facts to your list
- (4) S/he thinks that her/his unique lifesaver is an obsolete, risky, and no-more-supported process like HardMod
- (5) S/he injected a NAND copy from another console on the problematic one
- (6) S/he doubts that a hardware failure/damage could be the cause for her/his console problems
We should give jason the benefit of doubt. As long as the board is physically intact (no shorts, broken traces, fried or missing components), ntrboot + * Lazarus3DS can revive a 2DS/3DS that had its firmware completely trashed with a garbage NAND reflash (super softbrick).
- * Lazarus3DS was made for these super softbrick scenarios. CTRTransfer (Type D9) will get a 2DS/3DS back to a bootable state but can fall short replacing certain console unique files that were erased.