Stuck in a loop or corrupted.

Hi, I have joined this site, in the hopes that someone out there can put me out of this madness. I have bought an iphone 2g from ebay, problem dead battery. After fitting the battery, I pressed the power button and a pineapple popped on, I waited for around 15-20 seconds and it started up. I went to the menu had a look at the version, which was 2.1 and then I pressed master reset, at this point I knew nothing about jailbreaking, it showed an apple with a bar, this took around 1 and a bit hours to complete, it then switched off and then on to a pineapple, then it buzzed twice like it was going to start, but nothing. I have read the threads about putting it in DFU and recovery mode. It will not do either, in windows or mac. This is what I have, to turn it on press the top button, the pineapple comes on very fast, maybe 1 sec, to turn it into black screen or maybe off, press both buttons, if I keep these 2 buttons held, it will come on to the pineapple, then go off after around 5 seconds then come on in 3 seconds then go off after about 5 seconds and stay off, if I leave it on with the pineapple it will go off about every 6-7 minuets on it’s own and then come back on again, also every now and then the wait wheel will go round on the pineapple. If I leave it on till the battery fails, it will show the battery and charge symbol, as soon as I put it on charge using firewire, the pineapple kicks on again. I have down loaded iTunes 7.7, also most of the programs for hacking, but they all seem to need the phone to be recognized by iTunes. I have never seen the recovery symbol because I can’t get it. So it’s only pineapple, black, or battery, nothing else. I have held every button configuration known to human kind for the last 2 days, and nothing. I hope this all makes sense. Can anyone help me please, I am going out of my mind.
Thanks Bob

No go

I can't get it in DFU, or restore.
Thanks Bob

I am an electronics engineer

I had no problem with the battery fitting, the course of events, was stuck in loop before battery replacement, I then replaced the battery with the hopes that being with out any power, this may help, but no change, after fitting the new battery. As far as patients, I have been doing this now for 2 days. I switch it on, the pineapple comes on in less than a second, if I press both it goes off in 5 sec, but switches back on to the pineapple within 3 sec.
Bob

Checked it all inside

Thank for you time on this, I did just now check the inside, all looks great. I will say, the battery change was a easy dream job, I thought the casing would put up a fight, but the job went smooth. Lets hope something happens, on the button pushing bit. Would a sim in or out make any difference. I think from what I have read and seen on utube, most people are putting them in DFU from a working phone, not from a pineapple. I have described the window of seconds I seem to have, if you think somewhere in that window, I could get in, please tell. From what I can do is press the top get a pineapple in one sec, then what? if I hold down both, the screen goes black in 7 sec, but comes back on in 2-3 seconds, if I keep holding it will go off in another 5-6 seconds but not come on again.
Thanks Bob