That's news to me... (which also serves to show it's been some time since I last ventured here, of course)... would you please kindly provide a link for more info about these adapters with the added capacitor? TIA.
And, BTW, you do rock!
and as Note1 to the Guide by CarterinCanada:
Note 1: I received a nice email from an engineer at Pololu today (December 2010) advising me of something they've seen in the field with their adapter now that hundreds of you are out there unbricking your drives. It seems that there is a destructive LC voltage spike phenomenon that can occur when using particularly long or flimsy jumper wires. My reasonable guess is that this phenomenon can effect ANY brand of adapter so take heed. A strong enough spike can damage your adapter permanently so use reasonably short jumper wires in your setup - I just measured mine and they never exceeded 30cm (12 inches) in total and were made of 22 gauge solid (not stranded) copper wire. Also be sure your power supply is nice and healthy as one that is weak or ailing can exacerbate the issue. They have an interesting paper on the effect linked on the manufacturer's site above for those of you interested in such things as well as a very cheap preventative measure (a fifty-cent electrolytic cap inserted into the setup - with a photo and instructions even) which should completely prevent such spikes from effecting your adapter. Whether you add this extra component or just keep your jumpers nice and short is up to you but at least now you have the info at your disposal which should alleviate any tendency to panic about such things. Thanks to Ben at Pololu for the info from the field.
Usually the good guys @ Onepcbsolutions are very nice, and I am pretty sure that they can do the ROM swap for you alright, the point is however IF this will be effective.
What I mean if since you have this "intermittent" issue, it could be caused both by an actual hardware problem (that would be resolved by the "new" PCB with the transferred ROM) or if - for any reason - the firmware has entered into some kind of loop (different form the "usual" one) in which case it may not work.
Anyway, since what you risk (the 50 bucks) is much less than what you would have to pay for a dignosis by a recovery pro, it is still IMHO worth an attempt.