Had similar issue with one of my N900's, only it wont let me flash at all...fails at last stage of erasing CMT (from memory)...so unable to flash then proceed to eMMC flash. Have searched here for months to no avail. Phone loads but then notifies of internal error. After 2-3 minutes nothing will open except browser (fails to actually display) and xterm. No third party apps or mods installed in anyway. Gave up on it and it now sits in a drawer lol...whilst I wait anxiously for this one to die from another unknown issue.