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5 Posts

02-28-2021

India

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ThinkPad T495 crashes and reboots when moved around

2021-02-28, 13:05 PM

Hello. The title may sound a little ridiculous, but that's the only concise explanation I have for the issue I have been facing for over a year with my ThinkPad. In my thousands of hours of use since purchase 19 months ago, my laptop has performed pretty normally, except for one issue: I end up having to reboot my laptop if I pick it up with its lid open and, say, put it on my bed. Whenever it is handled and really just taken off of the surface its on, it will crash. Windows 10 bluescreens every time, with a random error each time. I can recreate this scenario a couple times for anyone who may need more info and take note of each error for diagnosis. I also have used Linux, and that just freezes until I hard reset by holding down the power button. I don't know even remotely what may cause such an issue, so I am drawing a total blank here. Thank you for any help you can provide.

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3810 Posts

12-22-2008

Canada

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Re:ThinkPad T495 crashes and reboots when moved around

2021-02-28, 13:52 PM

Welcome to the forum.

 

This is most likely an electro-mechanical issue, perhaps a loose or defective cable. Open up the system using the procedure in the T495 Hardware Maintenance Manual. Reseat all the cables to ensure that they're inserted into their sockets firmly. Do the same with removable components like RAM, SSD and other cards.

 

If that doesn't fix the crashes then it's also possible that a circuit board has a cracked trace that opens when the board flexes from movement. You might want to gently tap around the system with a rubber mallet to try to isolate the board or area involved.

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3810 Posts

12-22-2008

Canada

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Re:ThinkPad T495 crashes and reboots when moved around

2021-02-28, 13:52 PM

Welcome to the forum.

 

This is most likely an electro-mechanical issue, perhaps a loose or defective cable. Open up the system using the procedure in the T495 Hardware Maintenance Manual. Reseat all the cables to ensure that they're inserted into their sockets firmly. Do the same with removable components like RAM, SSD and other cards.

 

If that doesn't fix the crashes then it's also possible that a circuit board has a cracked trace that opens when the board flexes from movement. You might want to gently tap around the system with a rubber mallet to try to isolate the board or area involved.


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47 Posts

04-06-2015

Estonia

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Re:ThinkPad T495 crashes and reboots when moved around

2021-02-28, 18:15 PM

The computer bends when you move it. 

I had a t440s with similar symptoms - only when RAM was in socket (this had 4GB onboard and 4GB in additional socket). There was something wrong with CPU-to-RAM wiring, in principle, the correct way was to replace the motherboard. The guy I sold it to replaced CPU or something and was able to use it (I do not know, how long). 

Loose cables, theoretically possible, in practice not so much - the cables are flexible. 

 

So, if you have warranty, turn it on - it can be quite expensive is you leave it like this.

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5 Posts

02-28-2021

India

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Re:ThinkPad T495 crashes and reboots when moved around

2021-02-28, 18:32 PM

Oh no, this input really, really deflates me. It's out of warranty, unfortunately. I think I'll have to live with it, and just replace this thing when it's time. Additionally, a USB-C port on this is burnt off, again just an unfortunate incident that happened, unbeknownst to me my laptop just discharged whilst being plugged in one day. Just an ill-fated machine. 

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3810 Posts

12-22-2008

Canada

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Re:ThinkPad T495 crashes and reboots when moved around

2021-03-01, 2:51 AM

Loose cables, theoretically possible, in practice not so much - the cables are flexible. 

 

The issue usually isn't the cable but rather its connection. If it's not plugged into the socket firmly, i.e. is loose, then any flexing of the system could break contact on at least one pin.

 

But sometimes the cable itself can be the issue. This is particularly true for the cable that connects the LCD panel to the system board. That cable gets flexed every time the lid is raised or lowered. Over time the cable itself can break.


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3810 Posts

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Re:ThinkPad T495 crashes and reboots when moved around

2021-03-01, 2:56 AM

Oh no, this input really, really deflates me. It's out of warranty, unfortunately. I think I'll have to live with it, and just replace this thing when it's time.

 

If it's a loose cable or component connection then it should be easy to fix just by reseating the plug or board. If you don't feel comfortable doing this then any PC repair shop should be able to check that out inexpensively. The x460 series systems still have years of useful life in them so it should be worth it. OTOH if the issue is a cracked circuit board, especially a the system board, then it's probably uneconomical to repair.


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5 Posts

02-28-2021

India

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Re:ThinkPad T495 crashes and reboots when moved around

2021-03-01, 3:46 AM

Hey hausman, I really appreciate your inputs. I will mark this issue as solved for now, as this can't go any further without me going to a repair shop first, which I shall do in the coming few days I hope. And I'll hope its just a loose cable causing all these problems for now. For now, I'll also make a thread about what the repair to my USB-C port look like, which I know is hard to determine without inspection, but I don't have a Lenovo shop near me, and the independent repair stores near me I don't think would have ThinkPad parts with them, nor do I trust them enough to do anything further than a cleaning of the internals (and the loose cable thing).

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3810 Posts

12-22-2008

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Re:ThinkPad T495 crashes and reboots when moved around

2021-03-01, 14:32 PM

For now, I'll also make a thread about what the repair to my USB-C port look like

 

BTW you have two USB-C 3.1 Gen 2 ports on that T495 so one way to "fix" the broken port is to get a compatible USB-C 3.1 Gen 2 hub. Yes, it affects portability, but it restores (and adds) functionality in the fastest, easiest and least expensive way.


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5 Posts

02-28-2021

India

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Re:ThinkPad T495 crashes and reboots when moved around

2021-03-04, 12:31 PM
Oh yes absolutely. I'll look around for such a hub if I need it. Right now I can deal with the lack of a port, but I know I'll soon need it, which is when I'll buy such a port. Thanks for the tip hausman!
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