Out of Luck: New MOBO, New PSU still no POST Beep and monitor signal. Can this be the CPU?

Here is my computer: ]http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03499587&prodSeriesId=5295962

Symptoms:
- No signal on monitor screen
- No POST Beep (i have a system speaker)
- No light on power button
- The last time this was able to sucessfully boot. The cpu usage by the "system" was over 90% (check in task manager). In the middle of trying to fix the usage it automatically shut down. Then after a while there was no light on the power button. This happened about 3 weeks ago.

What have I tried:
- New Mobo
- 2 New PSU (Thermaltake 600w and a 430w. They are horrible brands but they should at least work. I didn't want to buy from newegg again. Returning an item is deadly horrible)
- CMOS Reset
- CMOS Battery Reseat
- Reseat RAM and place only 1 on all slots. I even borrowed 3 RAM from my 2nd computer
- External Build
- Main Function Build (MOBO, PSU, CPU, HSF Build)
- Reseat all connectors tons of times

Quesetions:
1. What causes no POST BEEP? (I know that CPU can cause that. As well as the RAM but I used 4 ram cards one at a time...)
2. What other parts causes no boot and no post other than Motherboard, PSU, and CPU.

Hypothesis
- It might be the CPU. I heard it is the rarest computer part to break. From my eyes I cannot see any bent pins. Also in the head of each pin (not the tail) some of them are darker than the other but not black. Is it normal for A8 processor to be like this? Other than there is nothing visually weird about the cpu.
9 answers Last reply
More about luck mobo psu post beep monitor signal cpu
  1. At that point I like your hypothesis, new mobo DOA? no light on that board either?
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819113331
  2. ur6beersaway said:
    At that point I like your hypothesis, new mobo DOA? no light on that board either?
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819113331


    There was no light built in the mobo. I couldn't check for DOA:
    This is the mobo.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813130662

    There is the system speaker near the SATA ports. No post beep on that too. Didn't had any tools or know any troubleshooting to check for DOA. All I know is that the new MOBO had the same symptoms (listed above) as my old mobo.
  3. The CPU is the first thing to start on any computer POST. You can't even get that far with multiple new parts, that's all that is left.
    You did plug in the dedicated 4 pin power cable on the mobo + the 24?
  4. ur6beersaway said:
    The CPU is the first thing to start on any computer POST. You can't even get that far with multiple new parts, that's all that is left.
    You did plug in the dedicated 4 pin power cable on the mobo + the 24?


    Yes I have. Even tested both the 4pin power cable (PSU came with 8-pin dis-connectable ones)
  5. Thank you, the no light at all on either mobo bothers me, but cpu can cook as well as anything else.
  6. ur6beersaway said:
    Thank you, the no light at all on either mobo bothers me, but cpu can cook as well as anything else.


    There isn't a LED built in that's why. The LED is suppose to be near the CMOS battery right? I have to double check later.
  7. Not a bulb (tiny led). it might work only when in use.
  8. ur6beersaway said:
    Not a bulb (tiny led). it might work only when in use.


    I can't find the led. My mobo doesnt have it or just not working.

    Here is my mobo info. Not the new one.
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03343058
  9. Don't worry about it, it is still CPU time.
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