After that, you're the computer maintenance engineer, seventh.

Fourth chapter shows class failures

An example of a definition

Such failures include not only failures caused by display equipment or components, but also irregularities in the display caused by poor other components. In other words, the display of the fault is not necessarily due to display equipment, should be fully observed and judged.

Second, possible phenomenon of failure

1, no display on the boot, the monitor sometimes or often can not power;

2, display color, jitter or scrolling, display hollow, Huati, etc.;

3, in some kind of application or configuration under the flower screen, hair dark (even black screen), ghosting, crash, etc.

4, screen parameters can not be set or modified;

5, brightness or contrast is not adjustable or adjustable range small, screen size or position can not adjust or a small range;

6, sleep wake up after the display of abnormalities;

7, the monitor smell or have a sound.

Iii. parts that may be involved

Monitors, display cards, and their settings, motherboards, memory, power supplies, and other related components. Special attention should be paid to the computer peripheral other equipment and geomagnetic interference to the computer.

Iv. Points of judgement/order

1, before the maintenance of the preparation

The latest version of the driver for the corresponding display card

2. Environmental inspection

1) mains check:

A. Whether the mains voltage is in 220v±10%, 50Hz or 60Hz, and whether the mains is stable;

B. The rest of the reference to the fault in the Electrical mains inspection section.

2) connection check:

A. Monitor and host connection prison sad, correct (special note, when there are two display ports, whether connected to the correct display port); The cable connector pins are deformed, broken and other phenomena, should pay attention to check whether the quality of the cable is intact;

B. Whether the monitor is properly connected to the listed power, and whether it is correct (bright and color);

C. Display equipment anomalies and whether they are related to ungrounded lines. Special attention: Do not allow computer maintenance engineers to install ground wire for users, users should be asked to install through the official electrician;

3 Peripheral and Host environment inspection:

A. Check whether the ambient temperature and humidity are in accordance with the manual (such as the diamond tube, the required temperature is 18~40c);

B. Whether there is a smell, smoke or abnormal sound (such as burst sound) after the display power is added;

C. Display card on whether the components have deformation, discoloration, or temperature rise too fast phenomenon;

D. Whether the display card is plugged in, it can be checked by reseating, wiping the gold finger part of the display card (including other board cards) with rubber or alcohol, or whether there are more dust in the main engine;

E. Whether there is interference in the surrounding environment (these disturbances include: fluorescent lamp, UPS, speakers, hair dryer, sad too near (50 centimeters) of other monitors, and other high-power electromagnetic equipment, cables, etc.). Note that the display direction may also be caused by the geomagnetic impact of the display equipment interference;

F. For color, jitter and other fault phenomena, can change the direction and location of the display, check the failure phenomenon can disappear.