iPhone 3G stuck on apple logo/boot loop.

[reesedxg]

iPhone 3G BB 6.15.00 FWM 4.2.1, I was testing some digitizers I had with a known good LCD I already had in the 3G and then I tested all the digitizers out and put the original one back on, when you unplug an LCD and replug it back in sometimes it's completely black or white and you gotta reset it by holding the home and power buttons down until the iPhone restarts. I put the LCD in with the original digitizer and it was completely black and I could use the vibrate button still, so I restarted the phone with the power and home button and the apple logo appeared(Wah Lah I got the LCD working!) but then it wouldn't boot into the phone it stayed there and eventually boot loops. I have downgraded it to 4.1 then 3.1.3 then 3.1.2 and it restores fine or with 1015 error on iTunes then all I did was use both blackra1n and use iReb to see if either would work. But no matter what it won't completely boot. I don't understand. I've tried iRecovery and RecBoot, still nothing, no clue what else could work. Maybe take the logic board out and into another casing?

[J03Y4G]

Have you tried to reinstall the iOS an make sure it's pwned also make sure that your host files are not blocking apple

[reesedxg]

Yes and downgraded and upgraded the phone and nothing works, have made sure it's in pwned DFU mode and have tried restoring with and without blocking apples servers. Still nothing.