Hello. I have three Dell Latitude 7350 with me. I updated the BIOS of one of them and something went wrong and the machine no longer displays. I tried to do a recovery without success. Even when I use the BIOS images of the first two, which work perfectly, to physically program the SPI ROM (25R512NWEQ I usually use the W25Q512JV@WSON8 8X6 algorithm for reading with RT809F programmer), the machine still does not display with a flashing sequence of the charging light (3 6) indicating that the BIOS is corrupted. Could someone help me fix this?
I have already tried to clean the ME with mfit 18.0.10.2285 but I still have the same problem.
Dell Latitude 7350 intel ultra 5 135u
board code 223117-1
this guy got the same issue on Dell Latitude 5450 at badcaps.net forum
No link to product page, not enough pcb (barcode not useful) information or IC(s) present and details, shared files as private password, no further tests attempted with Dell update file (complete or incomplete image,merge/cut) ?.. is IC(s) flash verified, re-read and checksum?
EDIT: Have you tried to swap bios_region from Dell file. Also in same file swapped region, another try out with but now with re-initilialized CSME lower version closer to the 2077 present in the Dell image. I see only big descrepencies in NVRAM area of the corrupted file with plenty of generated invalid fields.
The IC W25R512NW use’s 1.8v, did you in fact dumped the content again after programmed and compared to the original flashed file.
EDIT:
We can assume that its an hw failure then… you tested the bad (newly programmed) SPI IC on a working machine and why not the other way around and test circuit signal/voltages.
Good luck with it.
“did you in fact dumped the content again after programmed and compared to the original flashed file.” yes i did .
Normally I read twice, I compare before overwriting the content. When I write, I reread the content for a comparison before soldering it on the motherboard.
I’m using a 1.8V converter. I’ve already tried replacing the BIOS region with one that works correctly. I still get the same error 3-6.
I copied the working image into the SPI ROM of the computer that doesn’t work. I soldered it into the machine that was already working and I have the display. Which means the ROM is ok.
Someone just gave me an image on badcaps.net. The machine turns on, there is no more error 3 6 but still no display. I looked while making comparisons all the components are in their place around the SPI chip.
