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T460s RAM - Black screen

Posted: Wed Aug 05, 2020 3:42 pm
by Bonzocrux
Hi everyone, I'm new to the forum, It is a pleasure to be part of this community. I am a owner of an old and glorious t430 and a t460s. In fact, I'm writing about the t460s. I have an issue. Basically i would like to upgrade my Ram but every stick that i tested makes my screen black. Even boot, cant see lenovo screen logo and can t access to BIOS also.
So my t460s has 4gb ddr4 soldered RAM.
I tested 3 different stick:

SODIMM DDR4 2400 MHz PC4-19200 8GB (1x8GB) = black screen

SODIMM 4GB DDR4 2133MHz PC4-17000 = not recognized

SODIMM DDR4, 2400 MT/s, PC4-19200, 8GB = black screen

The BIOS is updated, although it does not have the latest version, but only the previous one. Do you have any advice what I can do, could the pins on the motherboard be damaged?

Thanks

Re: T460s RAM - Black screen

Posted: Wed Aug 05, 2020 10:52 pm
by MikalE
That's pickier than a T500. So, no advice for you. I don't have anything that new.

Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 2:56 am
by RealBlackStuff
The T460s partslist has these FRUs:
03X7048 4GB DDR4 2133 SoDIMM Memory
03X7049 8GB DDR4 2133 SoDIMM Memory
03X7050 16GB DDR4 2133 SoDIMM Memory
And I guess there's also an (not available at list-publishing time) 32GB stick.

Does your laptop boot without any external RAM?
What was the brand/type you want to replace?

Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 3:23 am
by Bonzocrux
Hi Realblackstuff,

Yes laptop works great without external ram. Here are the brands I used:

Patriot DDR4 2400 MHz PC4-19200 8GB (1x8GB)

QUMOX 4GB DDR4 2133 2133MHz PC4-17000

Crucial 8 GB DDR4, 2400 MT/s, PC4-19200

Thank you


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Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 3:59 am
by RealBlackStuff
Can you go into Device Manager and check if there are any exclamation (!) marks?
What OS are you running?
Are all drivers up-to-date?
Do you know anyone with a T460s from whom you could borrow his/her memory stick?

Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 4:03 am
by Bonzocrux
Is running Linux Mint, let me install hardinfo. I will post a report from memory board... Let you know

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Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 4:52 am
by Bonzocrux
Ok, here what i got:

From hardinfo i don't see any error

MemTotal Total Memory 3882300 KiB
MemFree Free Memory 2016188 KiB
MemAvailable 2501608 KiB
Buffers 56900 KiB
Cached 708688 KiB
SwapCached Cached Swap 0 KiB
Active 1085944 KiB
Inactive 479112 KiB
Active(anon) 881376 KiB
Inactive(anon) 31056 KiB
Active(file) 204568 KiB
Inactive(file) 448056 KiB
Unevictable 80888 KiB
Mlocked 0 KiB
SwapTotal Virtual Memory 2097148 KiB
SwapFree Free Virtual Memory 2097148 KiB
Dirty 38624 KiB
Writeback 0 KiB
AnonPages 880432 KiB
Mapped 265404 KiB
Shmem 112960 KiB
KReclaimable 70460 KiB
Slab 155784 KiB
SReclaimable 70460 KiB
SUnreclaim 85324 KiB
KernelStack 7408 KiB
PageTables 12544 KiB
NFS_Unstable 0 KiB
Bounce 0 KiB
WritebackTmp 0 KiB
CommitLimit 4038296 KiB
Committed_AS 3855832 KiB
VmallocTotal -1 KiB
VmallocUsed 24576 KiB
VmallocChunk 0 KiB
Percpu 2608 KiB
HardwareCorrupted 0 KiB
AnonHugePages 0 KiB
ShmemHugePages 0 KiB
ShmemPmdMapped 0 KiB
FileHugePages 0 KiB
FilePmdMapped 0 KiB
CmaTotal 0 KiB
CmaFree 0 KiB
HugePages_Total 0
HugePages_Free 0
HugePages_Rsvd 0
HugePages_Surp 0
Hugepagesize 2048 KiB
Hugetlb 0 KiB
DirectMap4k 204852 KiB
DirectMap2M 3842048 KiB
DirectMap1G 0 KiB

Maybe it could be a voltage problem. I need to check if there is a CMOS battery on the motherboard under the keyboard.

Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 5:26 am
by RealBlackStuff
Remove the backpanel, then the largest battery.
The CMOS battery is under that battery.
But I doubt that has anything to do with RAM.
Get a working RAM from someone.

Re: T460s RAM - Black screen

Posted: Thu Aug 06, 2020 6:21 am
by Bonzocrux
I believe is a mb issue. So i give up. Thank you all for Your help

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Re: T460s RAM - Black screen

Posted: Tue Aug 11, 2020 4:30 pm
by Luizapper
Hello, I've had the same problem with one of the two memory slots in a T460p.
After trying to power up with one hand pressing slightly the module through the main board has shown that the slot has weak locks.
I had to thight a bit on the locking latches and soldering the metalic base of it.

This was a result of different type of slots, one of witch is better designed that the other.

Bonzocrux wrote:
Thu Aug 06, 2020 6:21 am
I believe is a mb issue. So i give up. Thank you all for Your help

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