Cluster panel

Recently had the cluster replaced. It worked for about half hour and all gauges quit reading lights all light up the battery light, check engine, ABS, airbag, A/C does not worked or the radio. The mechanic could not figure it out and I am reluctant to pay any more money to this guy. He replaced the ignition and it did the same thing. Where do I begin to look? Also, it has been sitting for about five years but started regularly.