Lenovo Thinkpad T470 No Display, No Beep; 100% Fixed Under 2 Minutes

Lenovo Thinkpad T470 turned on but no display, no Beep neither.
Watch out for the cause of the problem and how the problem was fixed.
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[@haroldz123]

Is it new ram? Try to slot the "bad ram" then turn on. New ram can take up to 5 minute to boot the window.
Try insert the bad ram into other laptops too, expect it will boot up in 5 minute

[@zilicontech]

It wasn't. The RAM is dead.
RAM shouldn't take that long to POST (Power-On Self-Test).
A working PC with good RAM should POST in less than 10 secs.
It becomes longer if there was a BIOS reset.
NB: POST is the first thing that appears before the operation is passed on to the OS.

[@laizer254]

sorry engineer I got the problem with my lenovo T470 ,when i turn on the display is show fine but after few minutes or seconds it start to show some lines and the become black(it not display anything while the laptop still running),any help please.

[@zilicontech]

Have you tried another screen on it?