ViewSonic G71F + display back then were open?

ViewSonic G71F + display how open the back?

Display in the process of using the flap to the voice of flashing screen at the same time, the emergence of a high-brightness light zone (horizontal, 5-6mm wide).Flash Have been just fine.Recent increase in the number, I would like to open the back to clear the dust.

Off 3 screws found on the left side, right side, top and I have a 3 card.
In accordance with Internet tips, the card I use the Office directly to thin down the top, but it has been found that the top sheet directly into the picture tube.Prize if so, I fear damage to the card.
Not removed.

Who Know?

Display behind Gaoya Bao, non-professionals or not to demolish dangerous.