T61 Display Problem and Annoying Noise from ESC button area

I have two problems with my T61, model 6460-66U. One's with display and another is annoying noise coming from ESC button area.

Ordered in Feb, 2008 for college use, as soon as I start to use it there's some problem with the display quality. When using Aero there would be black square spots appearing on screen and would disappear when hovering mouse over these areas. Processing speed is somewhat slow when using Aero. While switching to Basic Vista style, those black square spots will only appear in the Windows Photo Gallery's left corner, like the image shows:
http://farm4.static.flickr.com/3149/2746362257_6dc6a4d6a2_o.jpg When playing videos, like avi, rmvb, wmv files, there's a common problem that the screen in the media player keeps flashing with the green color. I thought it was the RAM, because it's 1G so it got upgraded to 3G over summer break. Hoping the problem would be solved, but not :smileysad:. Recover the system back to factory status helps a little, but after upgrading the newest driver (7.15.11.7597) of Nvidia 140m there would be sudden black out on screen, and notice of display driver stopped working. When degrade to 7.15.11.129 version it runs fairly well but problem with Photo Gallery and videos as mentioned above still exist. I found a Korean media player which could fix the video playing problem, but with Windows Media player, Realplayer and other major video player the problem still exists. Screenshot of the problem is here

http://farm4.static.flickr.com/3087/2746362307_aff12c556c_o.jpg I upgraded BIOS, but laptop would become slow and video images would blur/double shadows. So I swtiched it back.



And recent few days, there's annoying noise coming from in the upper left corner, where ESC button is. I don't know whether it's from the fan or the AC adapter, it's like Zssssss, and if I press my finger on it, the noise would be a little louder. There's a similar problem that I noticed in the first few weeks with the experience of this laptop, whenever I maximize the volume (both volume control of computer and the music player), some annoying noise, which is similar to this Zsss sound but louder will buzzing along with music. Didn't care much about that since if I don't maximize the volume it would just be fine. But this time the whining noise won't disappear. What probably cause this? Anyway to fix it, like replacing certain parts??

Suggessions and help would be very much appreciated. Thanks!!



---

Original description: T7300(2GHz), 1GB RAM, 160GB 5400rpm HD, 15.4in 1680x1050 LCD, 128MB nVIDIA Quadro NVS 140M, CDRW/DVDRW, Intel 802.11agn, Bluetooth, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint reader, Intel Turbo Memory, 6c Li-Ion, WinVista Business