PC won't restart after CPU upgrade

By MIXEDD
Jun 20, 2011
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  1. Hello. Today I have upgraded my CPU from Intel core 2 duo E4400 to E7500. Also I added 2gigs of ram to my system. When I boot up my PC Windows detected my CPU and installed drivers and asked me for a restart to take changes. When I restart my PC it won't boot up. I just see a black screen. All fans are working properly. When I turn off the PSU and start PC again everything works well but when I restart PC again it just won't restart no matter what. Please help me guys! It's a new hardware I don't want to demage it with shut down's like that. Also my motherboard is fully supported with the CPU the motherboard is Intel DG33BU.
  2. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    Have you checked for a bios upgrade for the motherboard? If there is, put the old CPU back in and upgrade the bios. If not, will the PC run normally with the old CPU installed? Try resetting the bios, if all else fails
  3. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    I resetted the BIOS and sorry forgot to mention that my BIOS is fully updated to the latest version which supports this CPU. Maybe this could be just a driver problem? Maybe I should try reinstall Windows 7?
  4. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    Yes, you can try a Windows 7 reinstall
  5. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    No success I have failed to install windows 7 after the first restart of windows installation I ended up with a black screen. :( Is there something I can do? I also cleared my CMOS memory and that didn't helped either. :(
  6. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    Put the old CPU back in and try the Windows install again. If it still fails try some old memory and try once more
  7. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    I tried removing RAM and that's NOT the solution to the problem. I'll try the method by installing the old CPU. If the method with old CPU will work and I succeed then maybe that's just a damaged CPU? Maybe I should get it back to warranty?
  8. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    Okay let us know what happens...
  9. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    The old CPU seem to work fine. When I plugged in the new CPU i downloaded cpu-z it shows fsb,clock rate etc... Everything is correct and works the way it should. Any more suggestions?
  10. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    "Everything is correct and works the way it should"... Except the new CPU, right?
  11. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    THE NEW CPU WORKS PERFECT. The only problem is that with the new CPU my PC won't restart. I don't say it won't boot when I TURN ON MY PC. IT WON"T RESTART. It brings me to black screen. :)
     
  12. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,711

    I would reset all the BIOS settings back to default using the old CPU and then swap to the new one. Use the old memory first until the CPU issue is fixed and then put that in - maybe module by module to check that this is OK too.
  13. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,677   +153

    "The only problem is that with the new CPU my PC won't restart"...

    So this is an example of the new CPU working perfectly? I would suspect that AlbertLionheart's suggestions be followed next. They seem to be a very logical next step
  14. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,711

    Thank you! I cannot remember how many times I have been faced with this sort of problem - but then I do run a small IT support business in middle England!
  15. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    Non of this worked. I took this PC to a friend of mine. He's an IT specialist. He solved the problem. He said it was a very unusual problem. Still thanks guys for your support! :)
  16. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,711

    You had better explain what the fix was for those of us who would like to know!
  17. MIXEDD

    MIXEDD Newcomer, in training Topic Starter Posts: 67

    As he said he made a bios repair and lot of other. I don't know what he used. He was in a hurry. So I didn't really bothered him asking questions on how he did it.


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