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tongsama
USA
6 Posts |
 Posted - 07/25/2010 : 19:19:51
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MSI PR400 Laptop
I am trying to flash a laptop bios that failed a regular bios flash. based on the schematics there is two 16m spi flash chips.
I took the laptop apart and found the amibios sticker on top of two MX 25L1605 AM2.
one chip had a red mark(left) and one blue mark(right)
now here's where it gets strange. I used a soic8 clip with my GQ-4x and the red chip no response, the blue chip would respond to the identify.
i read and its all FF on the code. so i write and verify. most of the time the writing would freeze at a %. once in awhile I can get it to write to 100% but verify would fail.
So i remove the chips from the board and now both chips wont respond to the ident command. i thought i fried the chips while de soldering it. so i put it back on the board, now im back at step one. only the blue chip responds to ident. any clues how i should proceed this? why does the right chip respond only while being on the board? i took off the cmos battery so the chip isnt running off some other power source.
the bios file's extension is .10D the version number. a little research shows that amibios are .rom. so i renamed and imported it correctly to the usbprg.
messing up the laptops bios made me buy the programmer. I am learning a lot and programmed bios' for my desktop computers. Its nice to know i can mess up on a bios flash and be able to fix it.
this laptop is the only thing killing me lol.. any suggestions?
laptop schematic hxxp://www.laptop-schematics.com/view/2456/
laptop bios hxxp://www.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=135&prod_no=1326 |
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| Reply #1
yelenavik
USA
31 Posts |
Posted - 07/25/2010 : 20:22:41
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| Clip for soic-8 probably have bad pin connection.What is about ID-correct?Secondly, better blow out chip by hot air,then try read,save,erase,then write,verify. |
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| Reply #2
tongsama
USA
6 Posts |
Posted - 07/26/2010 : 00:34:10
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| soic8 clip is new and identifies the chip properly when the chip is onboard. the problem is when i remove the chip and place in on the clip.. i dont get an ident reading. side note it sometimes fail to ID the chip after a few successes. |
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| Reply #3
ZLM
2945 Posts |
Posted - 07/26/2010 : 15:57:11
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You still need to check the pin contact with your clip. even it is been removed from the board.
Also, try to useslower speed to see if it makes different. |
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| Reply #4
tongsama
USA
6 Posts |
Posted - 07/29/2010 : 18:40:25
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okay i fiddled some more with it.. so here's where i'm at.
i resolder the chip back on the board. I can id, erase, read and write. the read gives me all 'FF'
so my writes goes to 100% but it always fails on the verify since the read is all FF.
do i have a faulty chip?
i double check connections and since it id correctly i assume all connections are good? |
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| Reply #5
tongsama
USA
6 Posts |
Posted - 08/02/2010 : 21:54:59
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| just a small update. I dont recommend the clip at all. it seems the easy path to just clip and program. but on a small laptop motherboard, it is very difficult to get the clip on correctly since other components are very close. I have triple checked connections but it wasnt on correctly. I desolder, and used an adapter, then the chip read and program fine.. operator error i guess. |
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Laptop Bios help plz
