1. Turn on the computer and the computer does not respond:
1. Check whether the power socket has power and connect to the computer normally;
2. Check whether the computer power supply can work normally (whether the power supply fan rotates after turning on), and whether the monitor is connected to the host normally;
3. Open the case cover to check whether the power supply is connected to the computer backplane or motherboard normally, and whether the plug between the baseplate and the motherboard is loose
Whether the backplane or motherboard is powered on, and whether the ATX power supply is incorrectly wired;
4. Unplug the memory module and turn on whether it will alarm;
5. Replace the CPU or motherboard.
Second, the power indicator on the bottom plate after powering on will turn off when it is lit and cannot be powered on?
First of all, see if there are foreign objects such as screws in the chassis, resulting in a short circuit. Secondly, check whether the power cord is reversed, resulting in a short circuit to ground. again
Use the replacement method to replace the power supply, motherboard, backplane, and other equipment.
3. After the IPC is powered on, the power supply works normally, and the motherboard does not have any reflection?
First of all, remove the peripheral plug-in card and the connected device to see if it can be activated? If not, you can remove the memory and see if there is an alarm? Then check
Is the CPU working? Finally, replace the motherboard and check whether the motherboard is normal
4. After booting up, I hear the motherboard self-test sound but there is no display on the display:
1. Check whether the monitor is connected to the host normally;
2. Insert another display card to check whether it can be displayed normally;
3. Clear the CMOS (there may be an error in the setting) or replace the BIOS;
4. Replace the CPU board (motherboard integrated graphics card) or monitor.
5. There is no display on the alarm display after starting:
1. Open the case cover to see if the memory module is installed or loose;
2. Whether the alarm sound is the same after unplugging the memory module and turning it on;
3. Clear the COMS (there may be an error in the setting) or replace the BIOS;
4. Replace the graphics card or insert a graphics card (integrated graphics card on the motherboard).
5. The general long tone is the fault of the memory module; There are two types of continuous short tones: one is the graphics card alarm and the other is the BIOS alarm;
Can enter the system but there is a short tone at intervals, there is a CPU temperature alarm setting under the motherboard BIOS, when the CPU temperature reaches the setting
The board will emit a short, spaced beep alarm.
6. The sound analysis of the start-up alarm is as follows:
Award BIOS
1. Short --- The system starts normally
2. Short --- General errors
1 Long 1 Short --- RAM or motherboard error
1 Long 2 Short --- Wrong monitor or graphics card
1 long 3 short --- Keyboard controller error
1 Long 9 Short --- Motherboard Flash RAM or EPROM error, i.e. BIOS corruption
Non-stop long beeps--- memory modules are not plugged in tightly, or the memory is corrupted
Repeated short beeps --- The power supply is damaged
AMI BIOS
1Short--- Memory refresh failed
2. Short--- memory ECC check error
3 Short --- system base memory, i.e. the first 64KB, check failed
4. Short--- The system clock is wrong
5 Short --- CPU error
6Short --- Keyboard controller error
7. Short --- The real mode of the system is wrong and cannot be switched to protection mode
8. Short --- Displays a memory error
9. Short---- ROM BIOS calibration error
1 long 3 short --- memory check error
1 long 8 short --- Wrong monitor or graphics card
Phoenix BIOS
1 Short: The system starts up normally
1 short, 1 short, 1 short: The system fails to initialize the self-test
1 Short 1 Short 2 Short: Motherboard error
1 Short 1 Short 3 Short: CMOS or battery error
1 short, 1 short, 4 short: ROM BIOS validation failed
1 Short, 2 Short, 1 Short: The system clock is incorrect
1 short, 2 short, 2 short: DMA initialization failed
1 Short 2 Short 3 Short: DMA page register error
1 Short, 3 Short, 1 Short: RAM refresh error
1 Short, 3 Short, 2 Short: Basic memory error
1 short, 4 short, 1 short: The basic memory address line is incorrect
1 short, 4 short, 2 short: The basic memory validation error is incorrect
1 Short, 4 Short, 3 Short: The EISA sequencer is incorrect
1 Short 4 Short 4 Short: EASA NMI port error
2 Short 1 Short 2 Short to 2 Short 4 Short 4 Short (i.e. a combination of all sounds that start as 2 short): Basic memory error
3 Short 1 Short 1 Short: Error from DMA register
3 Short 1 Short 2 Short: The main DMA register is wrong
3 Short 1 Short 3 Short: The main interrupt processing register is incorrect
3 Short 1 Short 4 Short: Handle register errors from interrupts
3 Short 2 Short 4 Short: Keyboard controller error
3 Short 3 Short 4 Short: The display card memory is wrong
3 Short 4 Short 2 Short: Error is displayed
3 Short 4 Short 3 Short: No display read-only memory found
4 Short, 2 Short, 1 Short: Clock error
4 Short 2 Short 2 Short: Shutdown error
4 Short 2 Short 3 Short: A20 Door Error
4 Short 2 Short 4 Short: Protected mode interrupt error
4 short, 3 short, 1 short: memory error
4 Short 3 Short 3 Short: Clock 2 Error
4 Short 3 Short 4 Short: Real-time clock error
4 short, 4 short, 1 short: The serial port is wrong
4 short, 4 short, 2 short: the parallel port is wrong
4 Short 4 Short 3 Short: Digital coprocessor error
BIOS Compatible:
1 Short: The system is normal
2 Short: The system power-on self-test (POST) failed
1 Long: Power error, if there is no display, it is a graphics card error
1 long and 1 short: The motherboard is wrong
1 long and 2 short: The graphics card is wrong
1 Short 1 Short 1 Short: Power supply error
3 long and 1 short: keyboard error
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