who can help me pls,my lenovo 510s after add 16gb ram can't open laptop, just black screen
when i plug in back old ram also can't open,i try to plug out cmos battery and plug out battery also can't,
an i try hold 120 sec on off button also can't , just power light on only
it has the sign of life, it is working and turning on but it just doesn't has the screen, i tried plug to external monitor but still can't. is there any way to fix this issue? already changed another ram and tried but it doesn't work too.
Well if you just plugged in an external monitor, while it was on, then it may not have worked.
Turn the laptop off (not sleep or hibernate but off).
Connect an external monitor to the laptop.
Turn on the external monitor.
Turn on the laptop.
NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.
If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.
If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.
You may also want to try hitting CTRL + SHIFT + WIN + B to try and reset your graphics driver as another possible fix.