Clevo i7 Laptop not recognizing an i7 CPU in socket but will recognize an i3 CPU

Flash Cloud

Estimable
Jul 18, 2015
9
0
4,510
0
I have a Clevo W860CU that came with an i7-740QM processor in it. I've had no problems with the laptop until about a month ago. On boot up into windows 10 the monitor would show the windows logo and the circles starting to spin but would then shut itself off. I could start the laptop into the bios and leave it there all day but any attempt to go into windows would result in the same as before. I tried taking out ram sticks and that didn't work.

I next tried a usb boot of Ubuntu but could not get past the splash screen without the laptop shutting off. I then tried CD boots into windows but the laptop wouldn't even bring anything up the screen. At least then it wouldn't shut off.

I replaced the processor with an i3-350M. The computer would boot into the operating system just fine but of course everything is slower. All programs ran fine. I ordered a new refurbished i7-740QM processor and replaced the i3. The computer does the same thing as before! I even tried taking out the ram sticks again but it still didn't work. I placed the i3 back in the socket and the computer works.

Does anyone have an idea what is wrong? I am flummoxed.
 

hang-the-9

Titan
Moderator
Only thing I can see that is off with the test is that you used a non-new CPU, there can be a chance the used CPU you got is also bad. But without trying a third one it's hard to tell if it's the CPU for sure or the laptop.
 

Flash Cloud

Estimable
Jul 18, 2015
9
0
4,510
0


Can't boot it into safe with the i7 in place. And the processor temps with the i3 currently are 42C.
 

Flash Cloud

Estimable
Jul 18, 2015
9
0
4,510
0

Bios is the last (latest) one for the model. And if it doesn't load Ubuntu what good will a windows system restore do?
 

hang-the-9

Titan
Moderator
Only thing I can see that is off with the test is that you used a non-new CPU, there can be a chance the used CPU you got is also bad. But without trying a third one it's hard to tell if it's the CPU for sure or the laptop.
 

Flash Cloud

Estimable
Jul 18, 2015
9
0
4,510
0


Yeah, I'm looking for another processor right now. Not sure I can get a brand new one though.
 
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