Hello,
I recently got a T440p (integrated graphics only) with an Intel Core i7-4600M and have some questions related to it.
1. First, the device would not boot properly - if no RAM was installed, it would beep 3-3-1. After installing RAM, it would pretend to start properly, but nothing is displayed neither on the screen nor on an external monitor connected with VGA. The green power LED is solid and during startup the backlit keyboard flashes once as if it was a normal startup. This is when using an external USB drive with SystemRescueCd only and no internal SATA drive. The lights on the thumb drive are solid so there seems to be no read/write activity. I tried to remove the external battery and the CMOS one, but this has lead to no positive effects. I also tried with another CPU and changing the RAM slot and stick but to no avail. Any clue what could have gone wrong with this motherboard? Corrupted BIOS? Some component/trace damage?
2. Based on the above, I replaced the motherboard. The system would now boot properly, however there are video artifacts when working with higher resolution. Here you can see a video displaying the artifacts when booting Windows 7: https://youtu.be/4JqViOmJoxk
I decided that having an integrated GPU, the issue must lie within the CPU so I swapped it with a tested i5-4300M and the artifacts were gone: https://youtu.be/Kkxv-j1fNJQ
In both cases I did *not* re-apply fresh thermal paste, however the problem should not be related to high temperatures as during startup, the 4300M got up to ~60 degrees Celsius. Currently Arctic Silver MX-4 was applied before the swap, however it is not electrically conductive so this should not pose any issue. Here is a photo of the i7-4600M: https://i.imgur.com/8Xsyodt.jpg
The BIOS version is quite old, but I doubt it that it could be the reason: https://i.imgur.com/uwI6B5t.jpg
3. Is there any way to read the accelerometer values from Linux or Windows? I dropped the new motherboard from a few centimeters on a hard bench and would like to see whether the accelerometer works properly. I read that tp_smapi does not work properly on newer ThinkPads, however there may be some other means to directly access the current values.
Thanks in advance!
Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
T440p + i7-4600M - video artifacts
-
- Similar Topics
- Replies
- Views
- Last post
-
-
T440p + Ultra Dock, but dock video out (HDMI) not working
by Arf the Lab » Sat Nov 04, 2023 6:58 pm » in ThinkPad T430-T490 / T530-T590 Series - 6 Replies
- 5544 Views
-
Last post by RealBlackStuff
Mon Nov 06, 2023 1:39 am
-
-
-
thinkpad t440p Linux trackpad + trackpoint not working.
by jaggreaney » Thu Nov 09, 2023 2:54 pm » in ThinkPad T430-T490 / T530-T590 Series - 1 Replies
- 3405 Views
-
Last post by RealBlackStuff
Thu Nov 09, 2023 11:48 pm
-
-
-
Unconnected black wire on fan T440P
by euless » Thu Nov 23, 2023 6:22 am » in ThinkPad T430-T490 / T530-T590 Series - 6 Replies
- 2165 Views
-
Last post by euless
Fri Nov 24, 2023 1:48 pm
-
-
-
Heat Sink Thickness for M.2 SSD T440P
by euless » Wed Dec 13, 2023 10:55 pm » in ThinkPad T430-T490 / T530-T590 Series - 0 Replies
- 1747 Views
-
Last post by euless
Wed Dec 13, 2023 10:55 pm
-
Who is online
Users browsing this forum: No registered users and 23 guests