[Gen8, Gen9, Gen10 Q&A, Help & Troubleshooting] WoodburyMan:
Thanks in advance for reading this and for any suggestions you might have! :)

I have a Archos Home Connect 35 Gen 8 device. I had it rooted on 2.4.82 firmware just fine. I wanted to update to 2.8.83 to get rid of the update notification I kept getting. I wanted to do it from a fresh clean slate as I wanted to reset my device anyway. First I used the Recovery Menu (White Menu) to restore back to default, then removed the SDE menu via the option to remove it in the SDE menu.

I then followed the guide that chrulri posted that I followed last time, but with 2.8.83 files. http://xdaforums.com/showthread.php?t=930197 (Note for Archos 35's you have to hold the power button for ~6 seconds, then double tap it to get to recovery instead of holding Volume Down like on other Gen8's). I was doing this on my MacBook Air at the time. (I rooted it before from my Windows PC). I went to 'Update Firmware" on the recovery menu, then took the SDE firmware file, and copied it over USB to the drive and safely removed the drive, then hit "OK" on the device. It proceeded to do the update it seems but only took 2-3 seconds so I'm fairly sure something didn't go right as it usually takes longer. It then said press ok to Reboot so I did.

After the reboot from that, the device turns on but I get a White screen. No Archos logo or anything. Usually this white screen comes on for a few seconds, then I would get the Archos Logo even if I was booting recovery. No luck. I tried resetting the device by holding power button for 20 seconds, waiting 10 seconds and turning it on, same issue. Recovery will not work either, I tried two dozen times to try and get it to load by doing the usual ~6 seconds holding power button then double tapping and no luck.

I tried hooking the device up USB and in Windows all I get "Unknown Device" in device manager, with DeviceId of USB\Unknown. I attempted to force both Archos' ADB driver and the Universal ADB drive onto it with no success. (I'm pretty sure its my device since normally when a device shows up and its capable of ADB you will get a difference device ID in Device manager like USB\ADBDEV1 or something. On my Mac, when I plug it in, all USB devices (Multitouch pad mouse included) will lock up for ~5 seconds, then in dmesg I can see it has a error on USB device and it disabled the device.

So something weird is going on with my Home Connect for sure. Any suggestions on what to try? I'm thinking somehow the filesystem or firmware on it got screwed up during the SDE flash and it can't boot anything even the recovery now. I have a MicroSD card I can use if there's some recovery feature built into it to get it to boot from the MicroSD slot or something to do a firmware recovery.

My only other option if there is no way to try and get it back would be to try and send it back to Archos for repair simply stating it was updating firmware and this happened. (No actual modified firmware is on it now as well, and i was flashing the Archos approved SDE firmware, so they should be okay with it).

Also the battery was fully charged when doing this. It seems different that the White Screen bug the Archos 101 and others get when the battery accidentally runs too low with older firmware.

Thank you again for your replied!