I have XPS 9550 WITH LA-361P REV 2 / TRIPOD motherboard. System will not POST (no Dell splash). If you hit power on, power light will turn on for 4 seconds and will turn off. USB is accessed during those seconds. No function keys (F2 F12) do anything so system will not get into bios setup or diagnostics. Screen blank during this process. However, "D" key + power-on will go through graphic testing so screen is working and keyboard input is obviously working.
Suspected BIOS issue but after create USB bios disk, <ctrl><esc> power cord inserted will NOT result in bios reload. No blink codes. Removed/swapped memory and no change.
I have inspected motherboard and no obvious physical damage, component all look clean. This unit just failed to boot one day. Wondering if this might be an bios issue.
So tell me if I am thinking right, if system can recognize the "D" key + power on to execute the screen test, doesn't that mean most/all of motherboard is working at least in regard to CPU? The fact that USB drive is accessed (ie, light turns on for a second), that means something is directing it to do that?
What is going on with POST test? How do I figure out what is going on? I tried to replace bios chip from eBay with current bios but that did not seem to make a difference.
I love to solve this on my own as a software issue but I am willing to send to someone who can properly diagnose and repair. I already got "ripped off" by sending it to a company in TX who claimed to do component repair but simply said motherboard needed to be replaced.
Can someone lead me to document on what happens during POST on a Dell? Obviously the POST is not completing but how can I tell if it even starts?
Suspected BIOS issue but after create USB bios disk, <ctrl><esc> power cord inserted will NOT result in bios reload. No blink codes. Removed/swapped memory and no change.
I have inspected motherboard and no obvious physical damage, component all look clean. This unit just failed to boot one day. Wondering if this might be an bios issue.
So tell me if I am thinking right, if system can recognize the "D" key + power on to execute the screen test, doesn't that mean most/all of motherboard is working at least in regard to CPU? The fact that USB drive is accessed (ie, light turns on for a second), that means something is directing it to do that?
What is going on with POST test? How do I figure out what is going on? I tried to replace bios chip from eBay with current bios but that did not seem to make a difference.
I love to solve this on my own as a software issue but I am willing to send to someone who can properly diagnose and repair. I already got "ripped off" by sending it to a company in TX who claimed to do component repair but simply said motherboard needed to be replaced.
Can someone lead me to document on what happens during POST on a Dell? Obviously the POST is not completing but how can I tell if it even starts?
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