I would call the pros in. You done what I said without being there I can't see what it is. The only thing left to do is check the pcb and rewrite the EPROM which you can't do.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local