Computer makes a beeping sound when switched on, the CPU and motherboard fans start but there is no display on the monitor. Even after restarting the same problem occurs.
You are more likely to face this error , when you have not used the computer for a month or so, especially after certain seasons.
How to Fix it:
1. Try to find the cause of the error . When a computer is switched on , the hardware runs a power on self test (POST). If any errors in the hardware are detected in this test, they are indicated by audio beeps or an error code is displayed on the screen. The sequence of beeps and error codes vary according to the manufacturer of the motherboard and should be noted down for troubleshooting the problem..
2. Remove all the connectors for the mouse, keyboard, display and power cable from the CPU. Then remove the cover of the CPU. For most models of desktops, there is a single cover, which can be easily removed by hand, even without a screwdriver. For assembled computer the layout may make troubleshooting difficult.
3. If you have not used the computer for a long time, there is likely to be a lot of dust on the motherboard. Remove the dust using compressed air. This is recommended by most troubleshooting guides on the internet , but compressed air is not available in most hardware stores in other countries. Instead, use a thick paint brush. The CPU and power supply fan will have the most dust.
4. After removing all the dust, plug back all the connectors and restart the computer. If the beeping sound persists, open up the computer again. Check if all the dust is removed.
5. Remove the RAM from the memory slot, remove all the dust and reseat it again. Remove all dust from the computer slot also, so that proper contact is made between the RAM card and the PCB. Take care to ensure that the memory is fixed properly, else you could face a problem again.
6. In most cases, the problem is solved at this stage. If it still persists, a part may have got damaged, so you may have to get replacement parts according to the diagnostic code.. In most recent model computers, most of the components are soldered onto the motherboard, so instead of repairing a part, it is better to get it replaced.
