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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
- 4-Pin CPU power is Connected
- Took out RAM still not POST BEEP

Questions:
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.

My 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.

SOLUTION: My CPU was actually dead. I bought a new one and it worked perfectly. The best solution is actually wrong I'm not sure how it automatically select it.
9 answers Last reply Best Answer
More about luck mobo psu post beep monitor signal cpu
  1. It must be the cpu

    But for cnfirmation U can chck by inserting ram after taking it out n cleaning its contact points with an eraser den inserting only 1 ram

    Did u overclck ur cpu ??? Or did reinstall d cpu cooler cz may be d cooler nt installed prperly may have heated d cpu n caused its breakdwn

    Try another apu from ur friend or anywhere n i am sure it will work
    Best f luck
  2. Have you tried to boot without ram to see if you get any beeps? Can you check if the 4 pin psu cable for CPU is connected?
  3. hefox said:
    Have you tried to boot without ram to see if you get any beeps? Can you check if the 4 pin psu cable for CPU is connected?


    Yes I have a whole bunch of times. I guess you can say I tried everything there is,
  4. You checked by cleaning ram and inserting it ???
    Most probably ur cpu is out
    Did u overclcked it was there a aftermarket cooler???
  5. Sn1992-1361850 said:
    You checked by cleaning ram and inserting it ???
    Most probably ur cpu is out
    Did u overclcked it was there a aftermarket cooler???


    No, I never overclock. Cleaning RAM? I'll google how to safely do it.
  6. Ohkay
  7. Best answer
    diamondketo said:
    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
    - 4-Pin CPU power is Connected
    - Took out RAM still not POST BEEP

    Questions:
    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.

    My 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.


    Hey sounds like yo're having alot of the same issues as me. Its probably your mobo, my processor looks fine as well but I have a haswell I just bought and the socket pins on the mobo are bent theres like 4-5 of them. I'd take a hard look at your socket again.
  8. Having the same issues here, tried cleaning the RAM pins with an eraser, replaced the MOBO already and still no post, have used a different PSU and tried breadboarding it but still no PSU.

    Only difference is I have is power to my Casing LEDs, mouse and keyboard. odd thing about it though is whenever I power it off, the mouse and keyboard still has power even if I leave it for hours.

    Tried this in breadboarding to eliminate possibility of mobo being grounded, but its still the same, mouse and keyboard has power.
  9. JM Bauan said:
    Having the same issues here, tried cleaning the RAM pins with an eraser, replaced the MOBO already and still no post, have used a different PSU and tried breadboarding it but still no PSU.

    Only difference is I have is power to my Casing LEDs, mouse and keyboard. odd thing about it though is whenever I power it off, the mouse and keyboard still has power even if I leave it for hours.

    Tried this in breadboarding to eliminate possibility of mobo being grounded, but its still the same, mouse and keyboard has power.

    Turns out I had a CRACK CPU chip. I took it to a repair guy, he lift the processor gate and the whole top right corner was completely cracked. He told me I couldn't have done that just by installing it, that it had to have been damaged durning shipping and I just put the death nail into it when I closed the top. I dunno man, it cost me about 33 bucks to find out my CPU was finished before it even began.
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