how hard is it to replace a laptop's CPU?
My Thinkpad T420 appears to be on its last legs, and I suspect the CPU. It wouldn't boot yesterday, but booted normally after I let it sit for a few hours; and now I notice the comma key frequently does not respond. (If I'm oddly missing any commas here, you can figure out why. I tried to catch them.)
I was going to buy another used T420; then I thought of replacing only the CPU, taking a gamble that I'm right about it. It would save considerable money including long-term: my habit is to buy used laptops because I'm not really a power user needing the latest technology, but of course they always die eventually; so if I got away with this, I would want to do it every time one of my Thinkpads bites the dust. I wish I had thought of this long ago. And there's the fact that I don't really need a new laptop in toto; everything else about it is fine. Anyway, how much of a pain in the you-know-what would you say pulling out and replacing a laptop's CPU (specifically a Thinkpad's) is? I wonder what I'm in for. I hope it's not much harder than changing the CPU in a desktop tower, which wasn't particularly difficult last time I did it. But I've worked on my laptops enough times to know doing anything inside one is awkward and time-consuming. I hope I don't need to learn how to solder. On my desktop computer when I had one, all I did was apply the thermal paste and insert the chip--I think. It was six or eight years ago... I just don't want to take my laptop apart, try to get at the CPU, and then tell myself it's too much trouble and I should have just spent the $50-100 on another used one. |
Read the sensors and check temps, fan speeds and voltages. Fans are a much more likely culprit than CPUs.
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This may help: https://youtu.be/h94XFTDK2-8
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Before considering replacement of electronics, how about ensuring that the fan is working correctly and all exit/entry ports are dust free?
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My T430
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harry@biker:~ Code:
sudo apt-get update && sudo apt-get install lm-sensors Having bricked a IBM Z series laptop by installing a used bricked Pentium M cpu from ebay. It can be hit or miss. The clean recommends are a good one. Yeah. Your shot shows cpu as cooking. What does htop or top in terminal show? |
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System: Perhaps it is indeed the fan, because there it said 2929 RPM, and when I took the screenshot, those sensors said 1978. That doesn't sound right. ...! and now I just checked again, and the RPM had jumped up to 3221. |
Now I'm confused. The XFCE 4 sensors (which gave me the screenshot) say the maximum temperature is 46 or 47 C, while the lmsensors that I checked in the terminal say "critical" temperature is +85. Apparently "maximum" and "critical" are completely different.
This doesn't look good, though... |
Removing and putting back the CPU on my T400 was as easy as it would be on a desktop.
I recommend you just try dusting it and replacing the CPU's thermal paste before spending money on a replacement CPU. The part that's wearing out may well be just the thermal paste (which absolutely does wear out after 6 years). |
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watch "dmesg | tail -20" Code:
dmesg | grep -i memory Might wanna run smart tests on your hard drive also. https://askubuntu.com/questions/5280...ns-of-ubuntu-1 |
CPU temperatures should not be that high (unless you are running a job). You should check/clear the vents of CPU heatsink with compressed air then observe the behavior, then replace the thermal paste.
Instead of replacing the CPU, I would go for replacing traditional spinner disk drive with SSD. |
farenheit to celcius
110 F = 43.3333 C them temps are just fine. battery, power connection keeping it from turning on? can you pull the battery and power up with just a power cord on that laptop? comma key frequently does not respond. bad Keyboard? xev to see what it can tell you, might be something better out there to tell or show you that the kb maybe failing. it is 3rd gen CPU can't be that messed up. |
On your T430, it's pretty easy if you decide you do want to try replacing your CPU. I'll point out if you eventually replace it with T450 or newer (or any other model from another manufacturer that's Broadwell and newer), the CPU's are (nearly always) soldered to the boards so are SIGNIFICANTLY harder to replace, and also almost impossible to purchase standalone.
As far as steps you should check first, I think most everyone has that covered in spades... |
Greetings Please be careful about assuming "Maximum" has anythinmg to do with what the manufacturer considers "The Danger Zone". It is quite often that "Maximum" fits in default or user set fan speed control watchdogs. I don't know of any CPU that will just roll over and die at any temperature below the human threshold of pain which is ~140 Fahrenheit. Most will operate considerably higher for fairly long times.
That said it isn't wise to run them at such temps because errors are more likely and lifespan is reduced. Laptops almost always run hotter than desktops but it is best to maintain them both but especially laptops to keep them optimally cool. Refreshing the thermal paste is a common requirement and most! especially! if! you! discover! it is one of those stupid double-sided tape foam monstrosities that only make assembly cheaper and easier. Check the paste, check the alignment, check the tightness of the fit and check to fan for any obstacles and proper lubrication. There are videos on youtube that can walk you through and you might even be lucky enough to see your specific model. |
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And is my old tube of thermal paste probably still perfectly good after 6-8 years? It's just been sitting in a plastic bag in a closed box in my closet.
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try googling shelf life of the brand name, and in general.
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you may NOT be able to replace the CPU in a lap top most of the time they are soldered to the MoBo
unless your stupid rich and can shell out $1500.00 for the rig that can solder an IC package to a circuit board |
ThinkPad T420 CPU-Upgrade auf Core i7 Quad-Core
it's them thin ones you need to worry about, they are "glued" to the MOBO. you have to replace a perfectly good motherboard even if you want to upgrade the CPU. Let lone replace it because "you" burned it up. though with them one too can still replace the thermal glue/compound. Intel Core i7-2760QM Mobile Processor 2.40 GHz 6MB PGA988 Quad-Cores SR02W if you are going to replace it you might as well get a fast one for 50 US bucks. |
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