I need two things to fix this laptop... 1) to ID the BIOS chip (so far this seems to be a much bigger chore than I first thought since at this point I can't be sure we even have the correct chip 2) my programmer to be able to read and write to the chip, which I can't confirm until we ID the chip and even with one that "close", this EON chip still only gives me "FF" in all data fields. I'm currently at a loss of what to do next besides put it back together and ship it off to someone who can fix this. I need to be 100% certain which chip is the system BIOS or I can make things tons worse. I've already soldered two chips with wires and each time I solder there's risk of heat or electrical damage to the chip or other parts. I've searched and read everything I can, but still no confirmation of the location of the BIOS or the chip it's on.
No I misread Ion is a video chip. You have the right one the EON chip is it I'm confident of that. Now to figure out the pin config. The blue dot is it covering any numbers because I think there is something missing to get a proper I.D.
If you look at the blue boarder area that's your pin assignment and clearly shows the 8 pin bios chip. You got it! Wish you the best.
well, I've tried writting to it, but the software just sits at 0% complete... so at the moment it seems to be a bust. If you view my picture... Pin 1 is the depressed circle correct? Which then goes up the right to Pin 4.. then jump straight accross to Pin 5 and then back down the left to Pin 8... correct????
OK, then I'm wired correctly to my programmer... but all I can get is "FF" when I read and a stuck at 0% when I try to write. There should be data on the chip as the flash did complete correctly, it just has the wrong data on it so the fact that I'm only getting "FF" worries me.
its probably the voltage need 3.6 not 3.2 if your wires are longer than 6 inches it might fail.. u did do spi wires to the gq-4x ?
desolder it. the other components will draw and give FF also shorter cables.. 6 inches or so. pin 1 is black top right cable. pin 4 is green top left. the best wire is ide for hdd.. use that
well, that's a whole new chore then... desoldering a surface mount can be a pain and I've never tried before. I don't have a hot air gun and even if I did there are way too many small parts next to this chip to attempt that so I'll have to try this with my iron... should be fun. and we're 100% certain this is the chip right?... cause I don't want to go down the desoldering path unless we're perfectly certain.
100% this time. .. to desolder it. jump from the 4 pins every 3 seconds and lift gently with a needle attached to hemostats so it dont burn u (wait for iron to be really hot). then do other side.. dont over lift or too much bending on other 4 pins!
I think I've gained access.... I've desoldered and have wired up the chip and am now getting some real data. Is there a way to double confirm via data that this is the correct chip so I don't wipe another chip by mistake?? BTW... the chip looks like ass right now, hope I can get it back on.
dump it and read it with winhex.. compare to wrong bios u used. or just write it and dump and compare. u probably have to rename the bios.wph to bios.bin clean with alcohol. careful of flames with solder pen.