This time, I will introduce what to do and what to check if your desktop computer will not turn on at all after removing and reinstalling the CPU, using my own experience as an example.
In fact, just before writing this article, the power went out and I've been trying various things to fix it.
I will explain in detail from the reason for removing the CPU to the repair, so it may be a little long, but I think it will be useful if you find yourself in a similar situation.
My desktop PC specs:
- Motherboard model number: B550M-P4
- CPU: AMD Ryzen 7 5700X 8-Core Processor
- Memory: 32GB (2 x 16GB)
Removing and installing the CPU
Removing a CPU
The reason I removed the CPU this time was because when I checked the inside of the computer, I found that the heatsink of the CPU cooler (the silent CPU cooler Wraith Spire) was covered in dust.
In fact, I was trying to remove just the CPU cooler, but the CPU and CPU cooler were stuck together with grease, so they came off together.
When installing the CPU, you can lock it by lowering the lever on the side, but in my case, it came off if I pulled it with too much force. (When I removed the CPU cooler, the CPU always came off.)
The grease has hardened and the CPU cannot be removed.Heat it with a hair dryer and then rotate the CPU and move it to the side.外しました。
Remove dust from the CPU cooler
First, wipe off the grease on the CPU cooler, then remove the dust with a plug stick purchased from Seria, and then vacuum it up.
Installing the CPU and applying grease
First, wipe off any grease on the CPU and then install it in the socket.
When installing the CPU, be sure to check the orientation of the CPU and that the pins on the back are not bent.
On the back of the CPU, there is a triangular arrow.
There is also a triangular depression on the socket side, although it is very hard to see.
このIf you don't install it correctly, the pins on the back of the CPU will bend (or break) and become unusable..
In my case, when it came off along with the CPU cooler, it was subjected to force and was slightly bent.
If the pins are bent, they must be straightened as much as possible, otherwise they may break.
*If the cable is extremely bent or you are unable to do it yourself, it is best to leave it to a professional.
I used the tweezers that came with a kit for repairing Nintendo Switch controllers to remove the bent pins.
I think the pointed tip is just right.
The pins are very thin and small, and will break if too much force is applied.So you need to do it carefully.
Once the pin is roughly straight, install it into the socket, apply a thin layer of grease, and lock it in place by lowering the lever on the side of the socket.
Installing the CPU cooler
There is no need to apply grease to the CPU cooler, so just install it as is.
When installing a CPU cooler, be sure to first align the holes properly before tightening them if it is a screw-type cooler.
When tightening, for example, if it is a four-screw type, first lightly tighten one point, then lightly tighten the other point.
Then alternately tighten the remaining two screws lightly, until you have tightened them all a little at a time.
For example, tighten in the following order: top left > bottom right > bottom left > top right.
If the screw has a spring, do not press too hard.
Because it's hard to tightenIf you tighten it too much or press it too hard, the motherboard may break.Please be aware that replacement may be necessary.
Once the CPU cooler is installed, connect the power supply and check that it is working properly.
After work, the power goes out
After performing the above steps, I tried to connect the power cord, graphics card, monitor, mouse, etc. to check that it was working properly, but it would not turn on.
It's not that it doesn't turn on, it just doesn't respond at all, it's like there's no power going on.
I was working on straightening out bent pins on the CPU, so I thought it might have broken.
What to do if your computer won't turn on or the power button doesn't respond
If your computer won't turn on or the power button doesn't respond at all, don't panic. Try the following steps:
1. Disconnect the power cord and all other components connected to the computer.deviceand remove the LAN cable.
2. Remove the button cell battery attached to the motherboard.
Removing the battery will reset the BIOS settings (clear the CMOS). If you are using a RAID configuration, do not clear the CMOS as this may erase all data on the drive.
To remove the battery, push the clasp outwards.留め金Insert it from the other side and push it in.
3. Once the button battery is removed, press the power button on your computer several times to discharge the battery.
4. Remove all memory from the motherboard.
When removing the memory, be careful not to apply too much force and break it.
Also, since memory is sensitive to static electricity, be sure to touch the metal part of the computer case to discharge static electricity before touching the memory.
*It is best to avoid wearing clothing that is prone to generating static electricity.
5. Wait about 10 minutes, then install the memory and button battery in that order.
6. Connect the power cord and turn on the power.
If the CPU/DRAM lamp lights up
If the CPU and DRAM indicators on the motherboard remain lit when you turn on your computer, first press and hold the power button to turn it off, then check the following:
1. The above What to do if your computer won't turn on or the power button doesn't respond Please follow steps 1 to 4.
2. Remove the CPU,Is the installation direction correct? Is the pin broken?Please Confirm.
above Installing the CPU and applying grease Check and reinstall it.
3. Install the memory you removed. (If there is an empty memory slot, install it in a different location.)
If the metal terminals on the memory unit are dirty, gently rub them with an eraser to remove the dirt.
*Please remove eraser dust thoroughly with your fingers.
4. Install the button battery.
5. Connect the power cord and turn on the power.
BIOS Settings
If the power turns on without any problems, you may need to change the BIOS settings in some circumstances.
For example, in my environment, after turning on the power, a message like "Press F1 or F2 to perform setup" appears at the bottom of the screen.
In my case, I had to press F2 to enter the BIOS (UEFI) screen and disable the "CSM" feature.
- If both the "Secure Boot" and "CSM" features are enabled, Windows may not start.
- On the motherboard "B550M-P4", both are enabled when the BIOS settings are reset.
BIOS settings vary depending on the environment, so please read the manual carefully and set it accordingly.
And don't forget to save your settings after changing them.
Finally
This time, I introduced what to do and what to check if your desktop computer won't turn on at all after removing and reinstalling the CPU, using my own experience as an example.
I hope some part of this article has been helpful to you.
Finally, although I did the work myself, doing it yourself carries the risk of "possibly breaking it."
And even if one part breaks, it may not be possible to determine which part is broken.
If you proceed with the work without making the right decision, you may end up damaging other parts, so if you don't think you can repair it yourself, we recommend that you do not hesitate to ask a specialist store for help.
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