applications – identifying IMEI & SN from inoperable or unrooted android devices

what options are there to identify an android device (samsung102DL) SN & IMEI number if has a black screen &/or unrooted & inoperable? or OnnWalmrt Tab? I have been trying to do such a thing thru my laptop installing driver software and USB monitoring apps, but it seems they either do or can do 1 & not the other. Trying to get into my Samsung acct where I have 2 step verification enabled & yet the registered phone 4 account is long gone. Samsung asks for a device previously used per naming IMEI/SN. My past devices all are 100% inoperable per black screen or 3/4 screen messed up, not debugged enabled, etc etc. Plz some1 help lolz