Leak corrected but now issue with a radar?
"During the nail biting 12.5 minute descent from lunar orbit, the LM’s onboard computer (most critically needed during landing) shut down and recycled 5 times due to an erroneous checklist that had the crew turn on their ship’s radar too early resulting in multiple data overloads."
During the descent, the (very primitive by today's standards) computer displayed a "1202" alarm four times and a "1201" alarm once.
"Eventually the Executive found that there was no place to put new programs. This triggered the 1201 alarm signaling “Executive Overflow — No Core Sets” and the 1202 alarm signaling “Executive Overflow — No VAC Areas.” These in turn triggered a software reboot. All jobs were cancelled regardless of priority then started again as per their table order, quickly enough that no guidance or navigation data was lost. But it didn’t clear up the issue. The computer was still overloaded by the same spurious radar data, stopping new programs from running. In all, it triggered four 1202 alarms and one 1201 alarm."
During descent, Armstrong noted that the programmed course was taking them into a "football field sized crater"; he took over and landed manually a bit further on.