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8. PART:
TROUBLESHOOTING
Some troubleshooting issues are mentioned in this chapter under the following titles:
Prior points to be cared Frequently asked
questions
Restarting your system
Prior points to be controlled
When a problem occurs, it is very important to diagnose this problem in the correctly. Try to find out
what it is. Determine what causes the problem and under which category it falls. Please check that
your BIOS is up-to-date and your BIOS settings are set to optimum. Check if the device settings are
correct. Check the cable connections of your external devices. Be sure that drivers of your devices
are installed properly. Write down the error codes and messages displayed on the screen, if possible.
Contact technical support to get support.
Dear Customer;
TFT LCD Display technology is used in this product.
In TFT-LCD products, displayed image is created by coloured light spots called pixels.
Each pixel is composed of 3 sub-pixels [fixed colored (red, green, blue) light spots.
The sub-pixels in question may cause “spot errors by staying permanently on or off because of their
production technologies. Errors that are bigger than half of a sub-pixel (>50%) are considered as "spot
errors".
Please take the explanation below regarding a possible sub-pixel error into consideration.
This problem may arise during production of the product, but it may also be caused by misuse
(pressure on the screen, operation in high temperature environments).
There are two main sub-pixel errors.
Type 1: Permanently on sub-pixel or pixel (may appear red, green, blue or white)
Type 2: Permanently off sub-pixel or pixel (appears black).
Summary table below is determined according to ISO 134062 standards for sub-pixel errors.
Type
Explanation
Pieces
Note
Type1
Random (5mm or larger
distances)
x 3
Within Criteria
2 adjacent sub-pixels
x 3
Within Criteria
3 adjacent sub-pixels
1
Within Criteria
Adjacent 4 or more pixels
Criteria is
external
Type2
Random (5mm or larger
distances)
x 3
Within Criteria
2 adjacent sub-pixels
x 3
Within Criteria
3 adjacent sub-pixels
2
Within Criteria
Adjacent 4 or more pixels
Criteria is
external
Type1 and Type2 Total
5 pc
Within Criteria
Sub-pixel
Sub-pixel
Sub-pixel
pixel
39


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