I have a lenovo y430 laptop that comes one, shows all the leds ON for 15secs without display on the LCD then it goes off. What could be the problem? Thanks Venugopal Nair

Try booting into safe mode. Chances are that you have set the screen resolution and refresh rate to some value that the LCD cannot handle. That is why it works until Windows takes over. Once you are in Safe Mode you can get things under control.

Reinstall the driver

plug headphones and play a video or music file

if you hear it ok then the driver is installed ok

Laptops and netbooks IdeaPad Series laptops IdeaPad Y430 Lenovo Support...


check your settings

1. Click Start and type "sound" into the search bar. A list of search matches is displayed.
   
2. In the search results, click Sound under the Control Panel list.
   

The Sound screen is displayed.

Disconnect the AC power.
Remove the battery.
Press the ON/OFF button (to drain any residual voltage).
Re-insert the battery.
Reconnect the AC power.
Turn it on.
Instead of "resuming Windows", it should show the normal Windows startup.

Click on the link http://cgi.ebay.com/Laptop-LCD-Inverter-Lenovo-3000-C200-Y430-N100-IV12-/250756087342?pt=LH_DefaultDomain_0&hash=item3a623a3e2e#ht_586wt_1140

It seems that you laptop did not have the battery back up when the power was cut assuming that the battery was not charged or bad.
If so the laptop has crashed with a sudden cut off and could have damaged the hard disk in the PC.
If the set does not boot up even if the back up bios battery is good, then the possibility of the hard disk being faulty is high.

Please follow the diagnosis outlined in this article to check whether the backlight lamp or the inverter board are the root cause of the problem or not:
http://www.fixya.com/support/r6430776-troubleshooting_laptop_power_failures

If you connect the external monitor & nothing is displayed on it, then this means that both the backlight lamp & the inverter board are fine. The main indicators in these cases are the sound, and the hard drive LED on the laptop case. If the laptop sounds just like it always does for a minute or two after being turned on, it means it's going ahead and booting the operating system, but the video processor or part of the motherboard circuit for video output has failed. If the laptop just sits there and beeps when you turn it on, or if you hear the fan but not the hard drive chuckling with its active LED flashing away, it means the laptop isn't getting as far as trying to boot the operating system. While this could be due to any number of hardware problems, the most common and easiest to
troubleshoot or repair is RAM failure. If your laptop has two RAM modules installed, try booting with just one and then the other in the primary slot. If your laptop only has one RAM module, you might consider buying one online from a site with a good memory selector, like Crucial.com

Hi there it will cost approx 115$ - 140$ in UK & less then 175$ for USA. Thanks

The jack for the charger has come loose inside the laptop. How do I repair it?

Lenovo Customer service Contact Lenovo online technician and diagnose your problem in free.

Hi, good day sir, well there are pictorials on how to replace the LCD of a laptop on the internet, you may do search using search engines. happy searching.