I just updated my Dell E521 bios with the Modded SLIC 2.1 one I found here on this board but I notice after I flash it that my Service Tag has changed. I was wondering can I change it back to the original one or is the service tag linked with the SLIC and changing it back would revert the system back to a SLIC 2.0? If one has nothing to do with the other I would like to change it back to the original one. I've tried using the asset209.com method (i.e. asset /s <new_service_tag ID>) and it says it changed but I when look in bios system setup menu it still shows the old one still. Then I'd tried the svctag.exe method and a get error message saying the utility isn't the compatible with bios. If I'm missing something I would appreciate the help! Thanks in advance for any advise!!
Most dell machines come with drivers cd the service tag program is on that for your own model. can't remember off hand what foder it is in will have to search.
Sorry to necro an old thread, but I have 2 of these machines and happened to run into this exact issue. The modified bios available for this model will overwrite the service tag, svctag.exe doesn't support this model, and asset209.com doesn't write to the bios, so the tag will revert on reboot. I did manage to fix it however and I felt like I should post the solution even if nobody cares anymore. It turns out on the Dell E521 Resource CD has a second utility under CSD\TOOLS\BIOS named "AASSET.EXE" (yes, with 2 As), this one actually writes to the bios. Usage: AASSET /s <new service tag>. I haven't seen or heard of "AASSET.EXE" before, I just happened to stumble upon it on the CD and tried it out on a whim. I'm not sure if it works with models other than the E521, but it might be a working alternative for other models that svctag doesn't support.