Problem installing 2.04 ROM in A500

[BGary335]

I seem to be having some trouble getting a 2.04 ROM chip working with my A500, and am hoping someone can tell me what the problem might be. My A500 has the Rev. 5 motherboard. When I put the 2.04 chip in I get a red screen when I boot the computer up. I've done a bit of research and it appears that this red screen indicates a bad ROM chip. I seem to remember that the Rev. 5 board was a little different than the others. Is there anything special that has to be done in order to get a 2.04 ROM to work on a 5A board, or should it be as simply as just putting it in the socket?

Thanks in advance for any help!

[BGary335]

Wow, that's something I'm not experienced with at all. Where would I get a jumper wire? How does one install a jumper wire correctly?

[BGary335]

That sounds fairly simple. Just one question: where would I get the wire? Also at Radio shack?

[BGary335]

Anyone know where I can get the wire? I assume Radio Shack sells that too?

[BGary335]

About to begin this project, but have one question before I do so: I assume that pin 1 is the pin that has the small groove above it on the chip. If that's the case, then how do I count the pins so that I find pins 31 and 21? I want to make sure that I solder to the right places!  :-D

[BGary335]

That helps very much, and it explains why it didn't work. I found what I thought was an accurate diagram of an OS 2,04 chip, only what I found showed pin 21 down near the bottom right side, and pin 40 at the top right.

[BGary335]

Alright, then I had it right then. Hmm...my soldering job was probably botched somehow then. I haven't soldered since high school! I went to Radio Shack last night and picked up a 25 watt iron, a small spool of 24-gauge wire, and a small spool of solder, so I believe all the equipment I bought is suitable. I assume that all the wire is run across the top of the chip i.e. the wire from pin 21 to 31 is run from the top of pin 21 to the top of pin 31, and the wire from pin 1 is soldered to the top of pin 1 and run across the top of the chip to the place where pin 31 would normally go. If that's not the case, then that would be where I messed up.

[BGary335]

I was indeed using a grounded workbench. I've learned the hard way about how easy it is to destroy a chip with a little static electricity.  :-D

[BGary335]

Alright, I just received another 2.04 ROM, and I am about to try again with the soldering, but I'd hate to ruin another perfectly good ROM. Does anyone have perhaps a picture of what the final product should look like or something?  

[BGary335]

Well I attempted this again, and yet again it doesn't seem to be working. I put the chip in when finished, and instead of getting a black screen, or a red one, this time I get the first grey screen you get when it boots successfully. Unfortunately, it freezes here, instead of going on to show the other two shades of gray/white. Anyone know what I've done wrong? Perhaps I can still salvage this chip?

[BGary335]

Yes!! It finally worked!!!!

Thank you all for your help, and a special thanks to you banzai for those instructions!  8-)

[BGary335]

I'm not sure if my digital camera is working, but I'll certainly give it a try.