How can I reproduce my screen flicker so they'll believe me?

The intermittent nature of the annoying screen flicker on my Macbook makes it difficult to show a tech that it is a real problem and not some figment of my imagination. Does anybody know of a "sure fire" way of reproducing it? I have been able to recreate the rapid dimming and brightening of my Macbook screen by moving the brightness indicator all the way to the left and then bumping it up one click. This only works sometimes and it only works when I do it by clicking and dragging on the ball on the display screen in system prefs. It doesn't work by using f1 and f2. I made a video of my screen while it was flickering and put the video on the desktop. I'm sending it in as soon as my box arrives on Tuesday. They're also replacing my stained top case. I hope they will look at the video and at least test the inverter and cable to see if they're the problem. Any help with how to encourage them would be greatly appreciated.
macbook   Mac OS X (10.4.9)  

I am the victim of this problem also. The screen flickering & brightness of the screen suddenly fade to low intensity. The screen flickering happened everytime I use my MacBook.
May MacBook was the initial Jun 2006 version.
I already get those problems (a) sudden shutdown (replace the logic board), (b) palm rest area discoloration (change the bottom case), (c) power adaptor pin contact problem (replace the new one), (d) poor performance of battery life (awaiting confirmation from local Apple support, 180cycle max. charge only 50% of initial capacity) & (e) screen flicker issue (today just send in my MacBook for them to do diagnostic).
I really lost confident with my MacBook.
Should I request a replacement of entire MacBook?
My warranty period will be expired mid of next month & the are asking me to purchase the apple protection plan. But, I claim that the unit is poor in initial build quality & why I should considered the plan. It is unfair to me.
If the MacBook is in good condition then I will consider the plan for support another 2 years (fair), not in this reverse way.
Anybody please guide me how to pursue this matter.
I previously own an iBook G4 & PowerBook G4 TI don't have these problem at all.
CK Lim (Penang, MALAYSIA)

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