Free Computer Repair Service

1. power-on self test shows that the memory error
First of all, check the CMOS settings
Whether CMOS memory on the parameter settings are correct
Whether the configuration of memory in line
For example, if you set the memory to read and write cycle or memory read and write memory latency is less than the actual value should be increased to increase the memory or read-write cycle memory read and write latency.

2. if the fault persists, check the memory and memory access between the outlet slot is good.

3. if the fault has not yet ruled out,
Inspect the installed memory is correct combinations
General installation of motherboard memory sockets are divided into several Bank,
Each in the 2-4 memory socket can be installed to provide
32-bit effective data Pentium Class CPU data lines 64 to a 64-bit data access must be installed on two 72-line memory module.

Attention to Install memory as follows:

For most PC machines for the Bank is not in the same capacity in different SIMM will be inserted mixed together, a lot of different PC machines can be installed capacity of the SIMM, but packed in the same group all of the Bank must have the same article SIMM capacity, for many PC if the machine is the speed of the SIMM different interpolation be mixed together, the capacity of the same even if they will cause trouble, such as the computer has been running at 60ns ns 16MB of memory, if the motherboard free memory slot and then insert the SIMM speed of 70ns, the system may refuse to boot or shortly after starting the verge of collapse.

Although there are a lot of motherboard to support mixed install SDRAM and EDO memory, but it would be best not to mix because the SDRAM voltage is only 3.3V, while the majority of EDO memory will work at 5V voltage, although the board DIMM and SIMM on the power supply, But their data is always linked to one another, if SIMM72 lines SDRAM memory with DIMM168 line mix, although the beginning of system can work properly, but after a period of time to use,SDRAM data input my be damaged, of course, if your SDRAM is suitable for wide-voltage 3V-5V,then it will not damage.

4, if the fault has not been resolved, replace the method and check whether the memory has been damaged.

5, if the above measures are not effective, Issue should appear on the main board or control chip.

Fault 1:add a new computer memory，then Run-time crash and restart frequently.

Analysis and solution: This situation is generally added as a result of memory between the memory and the original, brand, speed and capacity are different or some different solutions can be used “on the low” principle,enter the CMOS,set DRAM Timing By SPD to Disable in Advanced Chipest Features, change DRAM Clock to 100MHz, Restart computer. If still does not solve the problem, you can try to replace memory slot, generally faster to plug in the memory slot on the first. If above all fails, it is proposed that under pure DOS to update the motherboard’s BIOS, the general problem can be resolved.

Fault 2:when start computer, the system self-test need to test 3 times before it is passed. Phenomenon is: the end of each test to start from scratch once detected, can be adopted after a number.

The above problem is usually caused by self-CMOS memory improper frequency setting. Just enter the CMOS and found”Quick boot” (quick start),and set it to “Enable” (allow), after power-on self test will only detect the memory again.

Fault 3: machines can not enter the operating system, for entry into the system is automatically shut down immediately after. Start with Safe Mode, after the prompt Himem.sys read “Error: Himem.sys has delected unreliable XMS memory at address XXXXX … …”

Analysis and solution: According to a message, the problem should be concerned with the motherboard or memory. Surface as a result of tips to start Himem.sys document is in memory errors, so in general the first to identify the problems from memory.

At this point try the following methods:

(1).the parameters in the BIOS is set to a conservative approach, the simplest way is to use the default parameters of the BIOS.

(2), you can try to use the discharge means to remove the information in the CMOS memory. If the above methods are not, it is proposed to repair the main board or direct replace it.

Fault 4: After the machine can not boot light, and with a long three short sound alarm

Analysis and solution: According to a long three short alarm sound can be an initial check to determine the memory error. turn off the computer and open the box to see whether there is loose memory phenomenon. In addition, if the memory are the golden finger aging can be slightly damp towel and gently wipe clean. and then inserted the original slot. General can solve the problem. Of course, attention should be paid to the above steps should ensure that all sockets are closed, otherwise easily lead to a short circuit burned accessories.