Dell Inspiron 5547 BIOS Corruption

[BinaryOperatingSystem]

Hi all! I am having trouble with a Dell Inspiron 5547. I tried reflashing this board and starting but was having no luck. On a whim decided to verify that the bios file was still intact and received a failed verification message. I then re-flashed it, verified that the image was intact, turned on the computer (no start), verified it again and it failed. I have tried changing the BIOS chip itself (W25Q64FWSIQ) and no luck. Right after re-flashing, the board pulls .42A (which is typical) goes to zero, and then pulls .33A and stays there. It almost seems like it wants to start, gets corrupted, restarts but cannot proceed with the corrupted image. I have tried several different ram sticks. On startup my multimeter records the Hz jumping around for a second until it settles at 11.67Hz (could be operator-error as I am unfamiliar with using this mode). Any help at all would be appreciated!! The pins on the bios chip go as follows:

PIN 1 3.3V
PIN 2 3.3v
PIN 3 3.3v
PIN 4 GRND
PIN 5 0v
PIN 6 0v
PIN 7 3.3v
PIN 8 3.3v

[SMDFlea]

Re: Dell Inspiron 5547 BIOS Corruption

Where did the failed verification message come from ,the bios software ? ,what programmer are you using, did you try a good bios dump .

[khaahk]

Re: Dell Inspiron 5547 BIOS Corruption

If by that you mean you write bios chip, solder it to mainboard - press the power button and then turn off the machine and read the chip and verify against the file you wrote - then of course you are getting a verify fail. Bios content is changing each time the machine is turned on. Even if you get a "no start" condition, there are still things written to it. You might have a failed video card or memory or not correct bios for the machine and still get a no start condition yet the contents of bios have changed.

[BinaryOperatingSystem]

Re: Dell Inspiron 5547 BIOS Corruption

Thanks SMDFlea and Khaahk for your responses. To answer your question SMDFlea, I got a failed verification message from Flashrom. I am using a CH341a_SPI programmer and a known good dump. What Khaahk is saying makes total sense, I am just new to motherboard repair and still learning. I will keep diagnosing, thanks again!