Disclaimer: I have no fucking clue how reliable this account is. It's from a forum post elsewhere.
I have some problems with my PSP. I have the black dirt in the plastic and some dead pixels. This problems makes my screen look pritty dirty with a white background on the screen. It looks like there is some dirt on the screen all the time and you can imagen how enoying that is...
On the japanese Sony homepage there is some informations saying that the black dirt in the plasitic is considerd normal. I also wrote them about my problems and this is the answer I got:
"Thank you for taking the time to write Sony Corporation.
Your inquiry has been forwarded to us at Sony Computer Entertainment
Japan (SCEJ) after being read by Sony Corporation due to the contents.
Please kindly note that, we would like a response on behalf of Sony
Corporation.
Liquid crystal display (LCD) of PSP is covered with polychromatic lid
and in order to protect the LCD, the surface of the lid is coated.
There may be a foreign substance looking structure inside the LCD,
but it is also caused by the product character of the lid.
It is not the failures from the manufacture.
The LCD is made with highly detailed technology.
Even though, it may have a missing pixel, or some red/ blue/ green dots
led all the time.
As it is on page 108 of the instructions manual, it is not a breakdown.
Please be free from care in using them.
If there are any scratches or fingerprints, please wipe it off with a
soft cloth.
Thank you in advance for your kind comprehension.
Sincerely Yours,
XXX XXXXXX
Sony Computer Entertainment Japan
Information Center"
-----
It certainly wouldn't be earth-shattering. Many companies do not consider a single-dead pixel to make a defective unit. In fact, Nintendo's dead pixel policy is unusual in that a single dead pixel is returnable (within a year at that)
I have some problems with my PSP. I have the black dirt in the plastic and some dead pixels. This problems makes my screen look pritty dirty with a white background on the screen. It looks like there is some dirt on the screen all the time and you can imagen how enoying that is...
On the japanese Sony homepage there is some informations saying that the black dirt in the plasitic is considerd normal. I also wrote them about my problems and this is the answer I got:
"Thank you for taking the time to write Sony Corporation.
Your inquiry has been forwarded to us at Sony Computer Entertainment
Japan (SCEJ) after being read by Sony Corporation due to the contents.
Please kindly note that, we would like a response on behalf of Sony
Corporation.
Liquid crystal display (LCD) of PSP is covered with polychromatic lid
and in order to protect the LCD, the surface of the lid is coated.
There may be a foreign substance looking structure inside the LCD,
but it is also caused by the product character of the lid.
It is not the failures from the manufacture.
The LCD is made with highly detailed technology.
Even though, it may have a missing pixel, or some red/ blue/ green dots
led all the time.
As it is on page 108 of the instructions manual, it is not a breakdown.
Please be free from care in using them.
If there are any scratches or fingerprints, please wipe it off with a
soft cloth.
Thank you in advance for your kind comprehension.
Sincerely Yours,
XXX XXXXXX
Sony Computer Entertainment Japan
Information Center"
-----
It certainly wouldn't be earth-shattering. Many companies do not consider a single-dead pixel to make a defective unit. In fact, Nintendo's dead pixel policy is unusual in that a single dead pixel is returnable (within a year at that)

