Imac gets white screen when turned on, can someone help me?

My aunt sold me her imac g4 for 80 bucks a couple of days ago.
It's 17" 1ghz with 256mb of ram, 80gb hard drive, an airport extreme card, superdrive, and an apple pro keyboard and mouse and mac os x tiger.
Last night it was working swell, but I had did research and decided I wanted to upgrade the ram and the hard drive, so a couple of hours ago I added 512mb pc2700 ram dimm, and also added a western digital 250 ide hard drive.
I also reapplied thermal paste to the spots where it needed it.
Upon turning on the system, it would do the normal chime and then the lcd would just go white, and it would stay that way, I also tried holding the mouse down and booting it, and it open the cd tray just fine, I was able to insert my tiger cd in there, but after rebooting again, it still stays white.
I can hear it reading the disc, but I don't know what to do, I really liked this mac, and I really want to try to fix this, any suggestions on what I can do to solve this?

can you boot into open firmware?
To boot to open firmware:
Restart the computer.
Immediately after the startup sound, press and hold the key combination Command-Option-O-F.
Note: The Command key has the Apple and () icons on it.
keep holding the keys till you see "Welcome to Open Firmware."

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Message was edited by: AMILLIANZE

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NOKIA C3-01 is displaying a white screen when turn...

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Hi Almach89,
Welcome to Nokia discussions board!
We are sorry for the inconvenience. I advise yout to try and back up your data with Nokia Suite. If you do not have it installed on your PC yet, you may do so with this link.
Then connect your device to it and go to Tools > Back up. Also go to Synchronise > Synchronise now > All. Once the sync is completed, check the different tabs to see if the data has been correctly synced. If this is successful, your data will now be safe (please use your own judgement).
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Press the 'Accept Solution' icon if I have solved your problem, Kudos my post if my advice has helped you!

White screen when turned on.

My iPod Nano (6th Gen) wont turn on when when using the sleep/wake button and when i hold down the sleep/wake button and the volume down button and a white screen just appears and stays there also when i connect to itunes it says "An iPod has been connected, but it could not be identified properly" And tried holding down the volume up and down button at the same time but nothing happens. Any suggestions?

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Imac gets white screen when turned on, can someone help me?

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