New CPU no display and same with old one now

I installed new CPU I have mobo asus b85 LGA 1150 and got i7 4790 replaced my i5 4460 ... Installed the i7 I'm sure I didn't do something wrong but no disbaly tried with the old CPU same my bios is updated BTW ... Touched the CPU and it is hot I replaced heatsink is

that's mean CPU works plz help me I don't what to do
Reply to Rambo_1
4 answers Last reply
More about cpu display
  1. 1 = The CPU being still hot minutes after you turn the PC off, may indicate the cooler fan is not working or disconnected, thermal paste is insufficient, or not applied. Make sure none of these is the case. A hot CPU may shut the computer down and if your fans are silent, you may not have noticed it happening, so make sure if that happened or not. Also check if all fans and led lights are turning on.


    2 = Next thing to check would be the BIOS. Reset it as follows:
    a) Remove the AC cable.
    b) Remove the battery
    c) Move the BIOS jumper from pins 1 and 2 to pins 2 and 3
    d) Wait 10 minutes before reverting everything and starting the computer

    3 = Would be a BIOS Recovery.
    a) Remove the AC cable.
    b) Remove the battery
    c) Remove the BIOS jumper
    d) Press the Power button and hold it pressed for a minute
    e) Reconnect AC cable, install BIOS battery and jumper and start the computer


    Hopefully 1 to 2 may solve it.. but in case that doesn't happen, check these possibilities:
    4 = 1 and 2 failing, did you have any trouble installing the new CPU?.. if so, the socket pins are sensitive and it's easy to bend them if you're not extra careful.

    5 = I've seen and read that PSUs sometimes fail when you do unrelated modifications, upgrades, and even when simply moving the PC. Try a diffent PSU or test this one in a different PC.

    6 = Was the i5 CPU having any performace issues? If that was the case, the issue may be either: the PSU, lose RAM module, motherboard issue, lose PSU connector on motherboard.
    Reply to Chicano
  2. Chicano said:
    1 = The CPU being still hot minutes after you turn the PC off, may indicate the cooler fan is not working or disconnected, thermal paste is insufficient, or not applied. Make sure none of these is the case. A hot CPU may shut the computer down and if your fans are silent, you may not have noticed it happening, so make sure if that happened or not. Also check if all fans and led lights are turning on.


    2 = Next thing to check would be the BIOS. Reset it as follows:
    a) Remove the AC cable.
    b) Remove the battery
    c) Move the BIOS jumper from pins 1 and 2 to pins 2 and 3
    d) Wait 10 minutes before reverting everything and starting the computer

    3 = Would be a BIOS Recovery.
    a) Remove the AC cable.
    b) Remove the battery
    c) Remove the BIOS jumper
    d) Press the Power button and hold it pressed for a minute
    e) Reconnect AC cable, install BIOS battery and jumper and start the computer


    Hopefully 1 to 2 may solve it.. but in case that doesn't happen, check these possibilities:
    4 = 1 and 2 failing, did you have any trouble installing the new CPU?.. if so, the socket pins are sensitive and it's easy to bend them if you're not extra careful.

    5 = I've seen and read that PSUs sometimes fail when you do unrelated modifications, upgrades, and even when simply moving the PC. Try a diffent PSU or test this one in a different PC.

    6 = Was the i5 CPU having any performace issues? If that was the case, the issue may be either: the PSU, lose RAM module, motherboard issue, lose PSU connector on motherboard.


    It worked with one ram but when I put the other 2 rams it is back to no signal to display
    Reply to Rambo_1
  3. Rambo_1 said:
    It worked with one ram but when I put the other 2 rams it is back to no signal to display

    Is the second CPU new or used, and does the computer work with the working RAM stick and with both CPUs? If it does with one CPU and not with the other, that CPU may be damaged... but see if cleaning the RAM stick pins and motherboard RAM socket pins helps.

    Use a soft cotton cloth moistened with alcohol... hold the cloth with your fingers and run it along each of the RAM stick pins, and try it... the motherboard RAM slots can also be cleaned with the same cloth wrapped around a regular paper clip, and run the cloth along the slot. If you use rubbing alcohol, wipe the RAM and socket pins after wards with a dry cloth and blow some air to dry then thoroughly before installing the RAM modules.

    If cleaning the RAM sticks and slots don't make a difference, (obviously making sure the RAM sticks bottom down on the RAM slots when installing them),.. run Memtest86 with each RAM module installed and see their condition by the number of errors.

    Download Memtest86 for Windows and see instructions to make and use a bootable CD or USB pendrive.
    https://www.memtest86.com/download.htm#v4

    See the images for examples of a good RAM result and one with RAM errors.

    No RAM Errors:


    Registered RAM errors
    Reply to Chicano
  4. i fixed it thanks for help i changed the ram stick to another slot and it worked fine
    Reply to Rambo_1
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