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!
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Dell Inspiron 5547 BIOS Corruption
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...Last edited by BinaryOperatingSystem; 11-15-2020, 07:18 PM.
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Re: Dell Inspiron 3147 motherboard unusual behaviour
Thanks for the quick reply mcplslg123, I checked Q2403 and Q2404 mosfets. Keep in mind that I may have a slow multimeter and I may be not capturing quick on and offs accurately. Here are the measurements:
Q 2403 N-Channel Mosfet
Source
GND
Drain
570 Ohms
~1v before quickly turning off
Gate
OL Ohms
0V when board is on, stays zero as long as board is on. Shoots up to 3.3v when board is de-energized then quickly fades to 0v.
Q 2404...Last edited by BinaryOperatingSystem; 11-04-2020, 09:58 AM.
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Dell Inspiron 3147 motherboard unusual behaviour
Hi guys, I have a few Dell Inspiron 3147 motherboards that are exhibiting the same issue. I am new to motherboard repair so if this is a very simple rookie obstacle bear this in mind I have the same issue on multiple 3147 boards (Winstron 13270-1) in which I have my DCBATOUT rail, my 3d3v_aux, and my 5v_aux and they are stable. However, when I turn on the bench power supply to power the motherboard my 3d3v_s5 and rail powers up to 3.3v for 1-2 seconds and turns off. The 5v_s5 rail gets to 5v before powering off. All rails turn off at the same time. The 3 and 5v regulator "PU4503"...Last edited by BinaryOperatingSystem; 11-03-2020, 07:46 PM.
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