Powerbook g3 Startup issues

Hey guys been along time at least 3 years , at least 2 since i owned a mac, lately i have been repairing windows based laptops , my dad brings me laptops he gets from work a few weeks ago i got a g3 powerbook 400mhz family number m5343 ,it had no hard drive or ram, so i put a 256 stick in it and a old ibm drive i had sitting there 4 gig i think, it booted up once or twice but i dont have any system disks, thats what happens when you lend things to friends, i have an old power boook adapter here that seemed to work , but now i have some disks it doesnt want to boot, soon as you plug in the power adapter it turns it self on for a sec, spins up the hard drive, and turns off, then when you press the power button it wont turn on till you press the reset button and the same thing happens, i ve tried pressing the button combo's changing the hard drive , changing the ram, i left it to charge the battery over night and it does the same thing with just the battery in. please help i have had a look on gogle but nothing relevant to my problem comes up and i searched on the posts but nothing , please help i really want to be back into the mac universe
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