Free Computer Repair Service

1.No boot screen after the screen display
   Memory occur as a result of such failure, usually caused by bad memory slot of  memory and the motherboard, as long as use of eraser to clean it,the problem will be solved (Do not use alcohol to clean), as well as the memory is damaged or motherboard memory slot may also caused such failure.
    As the memory causes boot failure no show, host speaker beep usually a long time (for the purposes of Award Bios).

2. windows system instability, often produce illegal error
Such failures usually occur as a result of the quality of bad memory chips or software causes, if identified as causes of memory,you only have to replace memory.

3. windows often cause damage to the registry, users are prompted to request the resumption
Because of such failures are generally caused by poor quality of memory, it is difficult to be restored, only to replace memory.

4.windows often automatically entered safe mode

PC133 memory is commonly found in certain articles did not support the PC133 memory on the motherboard, you can try to reduce the read speed of memory in the CMOS settings ,if you cann’t solve the problem,you have to replace the memory.

5. Random death
Such failures are usually due to a number of different memory chips, the memory speed as a result of a different time lag resulting in death, which can be set in the CMOS memory to reduce the speed to solve, otherwise, only use the same type of memory . Another possibility is that memory is not compatible with the motherboard, such a rare phenomenon in general, the other is also possible that bad memory with the motherboard caused by random computer crashes, Such phenomena are more common.

6. Increased memory,but the system resources reduced

This Phenomenon offen caused by motherboard not compatible with memory, PC133 memory is commonly found in certain do not support the PC133 memory on the motherboard, even if Re-install system also does not solve the problem.

7. High-end memory himem.sys loading documents, the system prompts the question of some address when start windows.

This problem is usually due to some memory chip damage, Solution can be found in the following memory maintenance.

1. With single-sided cutting blade of a motherboard from the abandoned copper silk, the same size, 502 glue paste, and using wires connected to the original lines.
2. Boot display lights, but unstable, with DOCMEM to make a boot floppy, and then start into NERO CD-ROM (with floppy disk to start slow and easy to damage), DOCMEM to test out the damage to the heart-chip address can be replaced.
3. Boot does not shine: The fault is too much trouble. I am a self-made testing equipment to determine the memory. Idea is this: through the adapter from the slot leads to two new memory slot, 1 # a good memory, the last piece of mind shielding film , 2 # at a bad memory, through the switch in order to replace the heart of a good memory on the chip, and then test DOCMEM to achieve the detection purpose.
4. SDRAM memory maintenance.

   Memory chip with a multimeter measuring method
And memory on the motherboard is 64 pin data, D0-D63, in order to protect the memory data bit feet, this D0-D63 in the 64 data bits plus one foot are not the resistance value (10 EU) threshold flow. The main principle of testing procedure is repeated for each memory chip testing data bit pin, see if there is no breakdown or short circuit pin data bit, there is a clock chip pin, address pin.

Therefore, when using a multimeter to test the chip tester can also be used to test the method, as long as red -to-ground (1 foot), and T Pai Yin resistance measurement of resistance, that is, data bit memory chips to determine the resistance which the chip is broken , the normal value, then the same for each data bit. But there is no test so intuitive, measurable in this way the quality of DDR memory chips.

1. Measure Memory chips by testing equipment

In accordance with instructions, Measurements of parts of the 2A, 2B, refers to a single group and double group mean. However, there are 16 of the chip 8, and is the equivalent of two 8-bit chips are also the equivalent of two groups of 16.
2A for the second group, 2B for the first group.
Measurement when the test cycle in each group for each data bit of a chip pin. General test of the 3 -5 times the bad is not good. A good chip for: PASS. Bad chip on the show that bad data bit pin.

1, the boot does not jump into the testing, in general are: short-circuit chip, PCB circuit board. Solution for the chip removed in exchange for the good quality PCB board chip test to see what the problem is.
2, the memory test does not test SPD chip, SPD chip optional.

3. burned Gold Finger can not be tested, You have removed the chip, the replacement of the good PCB board, and then test the quality of chips.

8.To run certain software often prompts memory

This phenomenon is due to the general system of insufficient disk space remaining, you can delete some useless files, and leave some space can be generally maintained at around 300M appropriate.

9. Guide to install windows from the hard disk into the disk space detection.

Such failures are usually due to files in the config.sys file emm386.exe added, as long as their shield out the problem.

In fact, in DOS mode from the hard drive to install windows to guide the way to more complex and slow one, it is necessary to install DOS on your hard drive files, and also configure the config.sys and autoexec.bat files, configuration files, if improper, but also triggered a series of cases of unforeseen failure, very useful for beginners.

Second,when windows install successful, because every time your system will be transferred to config.sys and autoexec.bat files to CD-ROM drive, Making the system start-up time extended, if masked after config.sys and autoexec.bat, under the windows drive sometimes not work correctly.

10. The system generated an illegal configuration error as install windows.

Such failures are generally caused as a result of damage to memory, the memory can be a method to solve the maintenance, if not, it is only to replace the memory.

11. System start many times automatically when windows restart.

Such failures are usually due to memory or power quality problems, of course, the system restarts there may be adverse or other CPU cooling caused by human error, which can only use step-by-step rule out the possibility of elimination.

12. Memory maintenance.

After several failures occur above, if the quality of the memory chip is damaged or not, such as iron conditions can not allow the memory of the chip discharge side to see if you can solve the problem, if not change the other side of the chip dumping until success is achieved (I am afraid that such a welder to repair mobile phones of people to meet). Of course, the conditional use would be much more effective detection of the oscilloscope), After using this method, only half of available memory, for example, 64M are available 32M, to that end, the small-capacity memory there would be no need for maintenance.