Question Toshiba Satellite L650-1NU - turns off after 4-6 minutes

[mikepl7]

Hello, I have problem with turning off Toshiba Satellite L650-1NU, it has processor - Intel I5-480m. Part NO: PSK1JE-0GD00KPL

What I did so far:

1. Disassembled all parts and clean dust from - motherboard, cooler and heat sink.
2. Cleaned CPU and GPU from old thermal paste, I also put new one.
3. Removed battery and plenty of times pressed power button, all further tests were done with only power supply plugged on - no battery.
4. Reset BIOS settings to default.
5. Attached other power supply from different working laptop.
6. Removed and changed combinations of RAM memory.
7. Removed hard drive and CD-ROM.
8. Run laptop and detached cable from power button - read some forums with such solution for higher Toshiba model 7xx - people run laptop with multimedia bar.
9. Measured CPU temperature under Linux and memtest86 - in both cases temperature was around 65-70C where I read for this model is stable even with 90C+ temperatures - max temperature on Intel website is 105C.
10. Checked capacitors and they looked fine - no bulge.

It shutdowns no matter if running in BIOS, Windows, Linux or memtest.

Please help me, I lost ideas what it could be. I didn't update BIOS because it is risky to start procedure if it shuts down in 4-6 minutes.

Greetings and thanks for help

 

[VirtualLarry]

Did this laptop originally ship from the factory with a different, lower-spec processor? Intel does build lock-outs into their chipsets, such that the laptops that ship with lower-end CPUs, cannot use higher-end CPUs, unless they also ship with the higher-end chipsets on the motherboard. Otherwise, the system shuts off at like 10 or 15 minutes, I think. Maybe sooner than that. You can web search for this info, I'm not making this up. I don't know if it applies to such an older system as that one, though. It could still be some sort of hardware fault.

 

[mikepl7]

This laptop was working properly for few years with the same CPU.

 

[VirtualLarry]

This laptop was working properly for few years with the same CPU.

Then it's not what I suggested, and seems like a hardware fault. How old is this laptop?

 

[mikepl7]

Hi, nope temp was around 65-70C. Yea I think this might be related to motherboard.

 

[Drassx]

Hi, nope temp was around 65-70C. Yea I think this might be related to motherboard.

With these consistent symptoms generally in my experience, especially with all the due-diligence that you've done i would come down to the same conclusion i'd(if its a must fix for whatever reason) get a new board, from oem or some 3rd party, dont know if the cpu is soldered but if not and it post's more than likely it's okay, if it is soldered obviously it'll likely come with the board.