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While soldering the jumpers for the EPROMs, a trace lifted and was repaired with a jumper. At one point, one of the driver transistors near the key pad cracked a lead and was replaced. The key pad works perfectly.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.