not sure if I should post this here, or in it's own thread... so I'll start here and if it should be in it's own thread a Mod can move it or let me know and I'll create one
I take no responsibility if anyone tries the following and totally fubar's their board
Now with that said -
Long story short, I scraped off some SMT resistors around the NB while replacing the heatsinks with better ones (trunk of a Maxima gets very hot...especially in Houston). I was able to fix all but one, and the result was NO VIDEO (talk about ****ed).
So I found the connection points on the BOTTOM of the MB (as I fubarred the top ones). Scraped the green coating off and prepped them for soldering. Took a 10K 20 turn (or more, don't remember but it changes in small increments) POT and soldered it via wires to those points on the bottom of the board. Maxed out the resistance and turned the board on (I had nothing to lose at this point anyway right?). Slowly turned the pot and lo and behold... VIDEO... very dim at first, but the more I turned the POT to lower resistance, the brighter the picture got. I found a sweet spot at around 110ohms. So I mounted the pot on the back of the MB where the TV out should go so I have easy access.
So those of you that would like to make your screen brighter than your LCD will crank up to, you can try this (not however I do NOT have the SMT resistor on the topside of the board).
Here is the top of the board. Northbridge is on the left, ATX connector on the right for reference. The area circled in RED is where the original resistor was. The spots circled in GREEN are alternate contact points you can use on the top of the board. Unfortunately, I was tired, impatient, and just plain retarted in wanting to finish it and I toasted those too
Here are some photos of the locations I used to repair my board:
Here is a large shot of the back of the underside of the board. ATX connector is on the right for reference.
Here is a closeup (as close as my camera would get) of the area of the solder points. The bigger one is already exposed copper, the smaller one toward the top will have to be scraped)
Here is a closeup after the wires have been soldered in place. The wires I used were from a floppy drive cable (anyone even have a floppy drive anymore??). And no, I didn't bother to clean up after the surgery
And finally a shot of the final assembly. I'd take a video of brightening and darkening the screen, but my camera doesn't take videos that I know of. I'll see if I can find one that does.
Again - if you're happy with how bright your screen is then leave well enough alone. Otherwise, either get a brighter screen or try this (or both). This seems to increase the brightness a good deal without making the screen look washed or faded - unlike messing with the controlls on my lilliput.