My lenovo z570 won't start even LED light also not blink

You may like to check the Lenovo (IBM) page on screen diagnostics:
http://mobilesupport.lenovo.com/gb/en/products/laptops-and-netbooks/ideapad-z-series-laptops/ideapad-z570/documents/HT062642?tabName=Solutions

I searched the internet on "no display on laptop" which gave some informative results, but as only you know all the details of what is wrong only you can decide what is relevant.
I found the following interesting, but there are many more:
1. http://www.windowsbbs.com/pc-hardware/42349-laptop-no-display-screen.html
2. https://answers.yahoo.com/question/index;_ylt=AwrBTzGx1V5To3QA5QxLBQx.;_ylu=X3oDMTE0ZXVrMTVyBHNlYwNzcgRwb3MDMQRjb2xvA2JmMQR2dGlkA1FJVUswMV85Mg--?qid=20090409183121AACuZ46
3. http://www.ehow.com/way_5272815_laptop-display-screen-problems.html (on the right hand side of this article there are links toother articles about laptop screen problems)

Does your computer beep more than usual when you turn it on ? Tis may be a sign that components are loose or have come out, or there is some fault which must be looked up.

To find out if it's your screen, connect an external monitor via the VGA port on the side of your computer Press the function button to select the external screen, or both, and if you get a display on the external monitor it's your screen or components associated with it, for example the 'inverter' or the CCFL if your computer has one. It may be that the display has become disconnected from the computer (there is often a ribbon connector). It may even be the graphics/video hardware on your mainboard. If it's the screen, you can replace it: detailed instructions for a similar model are here
http://www.insidemylaptop.com/how-to-replace-lcd-screen-on-lenovo-ideapad-z575-laptop/

If this is case you need to disassemble your computer and find out what is wrong with screen. The manuals for your computer can be found here
http://mobilesupport.lenovo.com/gb/en/products/laptops-and-netbooks/ideapad-z-series-laptops/ideapad-z570

But you rea;;y need to find out what is wrong before you can even attempt to fix it. If you are not able/knowledgable enough to dissemble your computer, DON'T.

28.April.2014

Measure the voltage at the AC Adapter plug, and see if it is within 5-10% of the rated voltage. If the voltage is not correct, then the battery will most likely not be charging, and the system will drain the battery and die in the middle of what it was doing...booting in your case.

You can tell how much voltage is remaining in your battery and if it is charging by checking the blinking of the battery status light.
Download the Hardware Maintenance Manual here:
http://download.lenovo.com/UserFiles/UserGuide/en/User%27s%20guides%20and%20manuals/Z370&Z470&Z570/Lenovo%20Z370Z470Z570%20Hardware%20Maintenance%20Manual%20V1.0.pdf
and go to page 30 and look at item 7 under battery status for blinking light meaning.
1. Blinking amber: (500ms off/1s on)
The remaining power of the battery is less than 5% of
its capacity.
2. Blinking amber: (100ms off/3.2s on)
The battery is being charged with the remaining
power between 5% and 20% of its capacity.
3. Amber: The computer is operating on battery power with the
remaining power between 5% and 20% of its
capacity

With the AC Adapter plugged in, and giving the correct voltage, If you are getting 1. Blinking Amber (light on for 1 sec, off for 1/2 second), then the battery is not being charged. Could be AC Adapter, Battery or Battery Circuit on motherboard. If the light is solid on 3. Amber, then the battery is not charging, and is draining.

Also make sure the power socket on the laptop is not loose or damaged. If it is, then it will need to be replaced.

I hope this gets you in the right direction.

i suspect the battery

I don't think the system is compatible with the TV it can't read the pad through the HDMI port only the RGB port.

if you have an external monitor or a smart TV you can hook it up to that to see if it even works. If it works then you look real close to the screen of the laptop without it being hooked up to the external screens and see if there is a faint image on the screen or you can do this part first. If there is an image but still dark check to see if the brightness is turned down. On the keyboard you will see a sun and moon shape on the F keys just press the FN key with the key for the brightness for a few seconds if it doesn't come up you may need a new screen or power board for the laptop.

Hello,Yellow means your battery charge is low, and it is being charged.

Green means you have a full battery charge.

So probably it seems your battery is out of juice. Keep it on charges & it should be fine.

If there is nothing changed, you may need to exchange the laptop charger.

Lenovo IdeaPad Z570 AC Adapter

Hope this helps.

the laptop does not support ac adapter

Exactly what happened to my v570.. power supply is stable when unplugged to the laptop but blinks when plugged in..i took out the battery .. same thing.. any other solutions here?

Hook a spare monitor to the video output usually on the back, if okay! the problem is in the LCD display, if symptoms are the same, you may have a virus, update definitions and run a deep or full scan of your system, if nothing shows, try a system restore and bring the computer back to an earlier time before this happened, if still no result! run a full recovery of the operational system to factory settings.

drivers bad to be replaced or the volume key is stuck