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Paper Tape
Posts: 4
Registered: ‎06-15-2019
Location: US
Views: 266
Message 1 of 6

HELP: T460s wont start with black screen with power on button light on.

After reading several threads in this forum, I decided to upgrade the RAM from 4GB to 16GB. I followed the sequence to disable the internal battery first, then remove and put back in the new RAM. However, when I power it up, the keyboard light was on and then off, but the screen still black with power button light on. 

I have tried the suggestion here but did not work. (https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/Lenovo-Thinkpad-T460s-not-booting/td-p/4... and https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T460s-Lenovo-turns-on-but-has-a-black-bl...)

where I disconnect the two battery and the internal CMOS battery and then press the power button 3 times and last time holds longer. But it did not help. 

Could someone give me some suggestions? 

 

Thank you in advance. 

schmidtj
802.11n
Posts: 160
Registered: ‎01-29-2009
Location: US
Views: 235
Message 2 of 6

Re: HELP: T460s wont start with black screen with power on button light on.

Be patient. That first reboot after adding memory can take a while. 

Lenovo Employee Vmax100K
Lenovo Employee
Posts: 90
Registered: ‎05-22-2019
Location: CN
Views: 187
Message 3 of 6

Re: HELP: T460s wont start with black screen with power on button light on.

I think you need confirm with LENOVO frist ,is it able to support max 16G RAM ?
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Paper Tape
Posts: 4
Registered: ‎06-15-2019
Location: US
Views: 157
Message 4 of 6

Re: HELP: T460s wont start with black screen with power on button light on.

I check the T460s service manual, It listed 16GB option. On my laptop, it has a 4GB solder on the motherboard with another in the 4GB DIMM slot. After I put back my original 4GB in, the laptop returned back to normal. I do not know if the RAM is bad or there is something I need to set up. 

The RAM I used is https://www.amazon.com/gp/product/B019FRBHZ0/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Community SeniorMod
Community SeniorMod
Posts: 9,691
Registered: ‎01-01-2010
Location: US
Views: 143
Message 5 of 6

Re: HELP: T460s wont start with black screen with power on button light on.

16GB DIMM is fine, but with some brands of RAM, compatibility can be an issue.  As stated above, the first boot after changing RAM can take a long time, up to two full minutes.  RAM with a Lenovo FRU is always the safest choices, but people have their favorite brands of non-Lenovo RAM.  I have had good luck with Corsair Vengeance, but others have different opinions.


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
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Paper Tape
Posts: 4
Registered: ‎06-15-2019
Location: US
Views: 133
Message 6 of 6

Re: HELP: T460s wont start with black screen with power on button light on.

Thanks Rick. I have waited for almost 5 minutes but the system just did not boot up. Maybe I should wait even longer? The RAM was purchased from Micron. I might consider the brand you mentioned. Thanks. 

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