I have MacBook Air 1.6 & Now My Mac Book Air have just white screen upon swithing on. ... Power up and get the sound

It is not finding the OS. Could be a corrupt OS or bad SSD. Hold down "D" immediately after the dong sound until the hardware test screen shows. Use the arrow keys to pick your language. Follow the instructions and post the error code if one is found. Chris

Resetting the PRAM may do the trick:
You reset the PRAM by rebooting a Mac and then immediately hold down the Command+Option+P+R keys, you will then hear the Mac reboot sound again, signifying your PRAM has been reset. You must hit the key combination before the grey screen appears otherwise it won't work.

you've tried rebooting, you've reset the PRAM, you've done it all, but your Mac is still behaving strangely. What next? In certain circumstances, resetting your Mac's System Management Controller (SMC) can be a solution. This is sometimes necessary to restore normal lower level system functionality to your Mac.

Here's how to reset the SMC on any type of Mac (and any version of OS X) and the type of problems that it may resolve.
When & Why Reset SMC on a Mac? Some Common Hardware Reasons

Typically it's power and hardware related issues that can be helped or resolved by resetting a Mac SMC, particularly if you're having these types of problems:

* Issues with your Mac's cooling fans and fan management: fans run constantly at high speed, fans run high despite low CPU usage and adequate ventilation, fans not working at all, etc

* Power management and battery problems: Mac isn't turning on, sleep isn't working, random shutdowns and reboots, battery isn't charging, Mac won't wake from sleep etc

* Light problems and improper lighting management: battery indicator lights aren't working, display backlighting isn't adjusting to ambient light changes, keyboard backlights not working, etc

* Video and external displays not working: display brightness functionality not working properly, target video mode isn't working properly, external display isn't working, etc

* General performance and functionality problems: abnormally sluggish behavior despite no CPU or disk usage, external ports not working, airport & bluetooth aren't showing up, external devices are not being found, etc

So now that you've concluded you need to reset your SMC (Note that the SMC is on Intel Mac's only), here's how to do it on MacBook's, MacBook Pro's, iMac's, Mac Mini's, and Mac Pro's. Notice that the reset instructions are different for MacBook and MacBook Pro's if you have an internal or detachable battery.
Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro's with an internal non-removable battery

This is how to reset SMC on most modern Mac laptops:

Shutdown your MacBook Air / MacBook Pro
Connect the power adapter to your Mac
On the MacBook/Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time
Release all keys and the power button at the same time
Boot your Mac as usual

Here's the key sequence to hold down:

Reset the SMC of a MacBook Air or Retina MacBook Pro

Do keep in mind that by resetting the SMC you will lose power specific settings, like the time it takes to sleep a Mac and other customizations to power settings. No big deal, but if you have made many changes to your hardware behavior you will want to adjust stuff like sleep behavior again.
Reset SMC of an iMac, Mac Pro, Mac Mini

Resetting SMC is different for non-portable Macs:

Shut down your Mac
Disconnect the power cord
Press and hold the Mac's power button for 5 seconds
Release the button
Reattach the power cables and boot the Mac as usual

Reset the SMC of a MacBook or MacBook Pro's with detachable batteries

mac reset the smc Older MacBook laptops with a removable battery can reset SMC with the following approach:

Shutdown the MacBook/Pro and remove the battery
Disconnect the power adapter, hold the Power Key for 10 seconds
Release the power key and reconnect your battery and power adapter
Turn your Mac on
Let boot as usual

Hopefully that will clear up your problems, if not it might be worth a visit to the Apple Store or a certified repair center.

Happy New Year,
Kerry

The DVD ticking sound is normal and happens every time you power on. The blue screen of death is not normal. The flashing question mark means corrupt start up file. Re-install the operating system or insert disc 1 of your gray install disc and go into disk utilities and select repair permissions. Then select repair hard drive.

Insert your installation disk that came with the mac and hold the "c" key while turning it on, this will force it to boot from the cd drive. Choose your language from the selection screen, I'm going to assume English, and choose Utilities --> Disk Utility from the drop-down menu on the top of the screen to open the Application. From there select the Mac partition of your Hard Drive on the left which should be called "Macintosh HD if you did not change it. In the "First Aid" tab, you will see two buttons on the bottom right hand corner of the window, "Verify Disk" and "Repair Disk." First Verify the disk, then Repair it, if it does not work at that point you will likely need to format your Hard Drive. If you do not want to lose any work and can't retrieve it any other way; get an external laptop HD case (specs are 2.5 inch by standard 9 mm, but could hold thicker like the 12 mm Western Digital Blue Caviar line above 500 GB) from Radioshack or similar, it should run you about $25. Transfer or backup any data you want to keep to your desktop, external or similar from there and format the disk and reinstall Mac OS. Cheers.

When troubleshooting a Macbook Air, there is a checklist from Apple Support you need to try.
You are welcome to do so after first trying these steps first.

• Check the Magsafe power adapter, to make sure it is free of debris and is seated properly.

• If with decent charge, try to start the Macbook Air, with only the battery.

If you get power from either one of these issue resolved- otherwise follow the steps provide more in detail from Apple listed in the link below.
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Apple Support Link:
Troubleshooting Macbook Air (additional steps)
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Such power issues with Macbook Airs as well as Macbook 13" and Macbook Pro 13" are about the same and there are no workarounds, so make sure to follow those procedures completely for a full assessment of your Macbook Air's functionality.

Hope this helps!

Regards,

-Mactechtrainer

Leave the Macbook air turned on until the battery goes dead. Then Connect to power and start it up. That should solve the problem. You problem was caused by not letting an update install in full.

faul on the lcd inverter

when you power press F1 or F2 or "del" or F5 or F12
try 1 by 1 to enter in bios.

Yeah, it does sound like a Fireware update. I've done those before.
Defiantly call Apple and get the tech guy. It's really your only option.