Sony VAIO PCG-SRX77 Notes On Use page 15

Using the notebook in low temperature conditions may produce a residual
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image on the screen. This is not a malfunction. When the notebook returns to
normal temperature, the screen returns to normal.
The screen becomes warm during operation. This is normal and does not
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indicate a malfunction.
The LCD is manufactured using high-precision technology. You may,
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however, see tiny black points and/or bright points (red, blue, or green) that
continuously appear on the LCD. This is a normal result of the
manufacturing process and does not indicate a malfunction.