Upgrading a 7400 with one expansion cabinet. Successfully upgraded the MP-40 and the LP-40. Used MMC818 to push the new LCP program to the card and it appeared to go normally. We were upgrading the LCP from v4.20 to v4.33. After several minutes of the phone display saying "Media Busy" the phone went back to normal as it does after pushing programming. The LCP then went through different cycles of the LED's (always repeating), but the card never came up after waiting 30 minutes. Rebooted the card...same issue. Rebooted the system - same issue. I did try to push both the old (v4.20) and new (v4.33) to the card as it was going through its LED pattern, but any time I try that, I receive an error message "write failure".

Brought a spare LCP over (v4.17) and it came up without an issue. Distributor tech support said there's nothing I can do - but wondering if anyone has any experience using the SIO port to recover a card such as updating an MGI/OAS.