T42G stuck on Welcome Initializing... please wait

[jolouis]

I don't believe there is much that can be done if the phone won't actually boot up fully. (From what I recall factory reset can only be triggered from idle, not during the boot process.. I could be wrong).

Do you at least see the phones grabbing IP addresses from your DHCP server, or do they not even get that far?

Have you tried new local power adapters or a different POE switch, just to make sure it's not a power problem?

If possible I would say your best approach would be to try and warranty replace them (if they are still under warranty); not sure there is going to be much else you will be able to do...