I am working on a GT Fore (2003 assumed security chip is G43) that is not booting on two different green boards (a Rev 5 (boot v1.06) and Rev6 (boot v1.07)). Status 1 stays green, no IDE light unless you disconnect the molex connector and power it back on. The HDD (75AA) tests fine, 3 partitions (500MB, 1.5GB and 5.1GB unallocated). I can install a blank 40GB HDD and the IDE light will at least stay on during boot, but I don't get any output on the screen (I don't expect it to boot with the 40GB because of the wrong boot rom). When the guy bought it, it was working. Got it to his house and it would not boot. He has had about 3-4 people come out to work on it and they have replaced the power supply with a Suzo-Happ supply, replaced the motherboard. I have tested the voodoo3 video card in an older PC and it is working fine, but when plugging the LCD into the card while in the GT PCB, I get no output, I assume because it is not booting. I have tested and wiped the original HDD and reloaded the 2003 CHD, same result.
I've tried two different power supplies, and U15 pin 32 is showing 5.10V on both boards. Other voltage testing points test OK; I've treid adjusting the voltages from the power supply, with no change.
I know I need a new boot rom to use a larger HDD, but since it is not booting, I really don't want to order one until I can get the board to boot.
I have now ruled one of the PCB's (Rev 5 board) as bad because there are burn spots up by the trackball connectors. I have not found any burn or corrosion spots on the other board (Rev 6) yet.
I have reviewed several of Ed's posts of similar issues, but have not fixed the issue. I have not changed the sockets, but I did heat them up with a soldering iron from the bottom to make sure they are making a good connection and tested continuity. I've tried botting from BOOTROM v.103, v.106 and v1.07, none of them boot. I do not currently have a logic probe or an EPROM programmer at this time.
Anything else I can try?
Thanks in advance
Here is a picture if it is useful
https://www.amazon.com/photos/share/wB5UPvcSkMm8tqJQP3f1Yrxe4lE78blhVa0zYblpbmK