IOGear GCS1802 - Manual (Page 46)

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If the “Upgrade Succeeded” screen does not appear, the upgrade failed to complete successfully, in
which case you should do the following:
Power off the KVM and remove its housing. 1.
Using a jumper, short the pins on the mainboard labeled J14. The diagrams indicate the jumper 2.
location on the GCS1802 / GCS1804 boards:
Upgrade Failed