Sometimes monitor light blinks but screen shows nothing.this system boots sometimes and sometimes it stops in the middle of installation of fedora7 or suse10.3 just like when pc hangs and after that monitor doesnt anything but red light on the tower keeps blinking,i checked my mobo from service center and they told there is no problem with it,i got my RAM replaced.Is there a problem with my graphics cardor power supply
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Re: system is not workin properly
You might try this. Shut down the computer, disconnect power cords, disconnect everything at the back of the computer, mouse, key board, etc. Open the case, ground yourself by touching an unpainted area of the case and remove the power connectors to ALL optic drives and floppy drive if you have one. (Of course do not disconnect the hdd.)
Reconnect mouse, keyboard, etc., and power cords to wall outlet.
See if it will post now. If it does I say you have a faulty power supply.
I was given a computer which was doa. It would not post, after I tried the above routine it posted then booted to windows.
I replaced the psu and now the computer works fine.
Hope this helps!
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Did it boot all the way? Do you hear the fan running, disk drive spinning? If it sounds like it booted but the display is black, try this: When you press the power button do you hear fansrunning, hard drive spinning, lights on the computer, hear any beeps or lightsconstantly blinking, hear the DvD/CD drive click and the light on the drawer ofthe DvD/CD turn on for a second or two? If so the laptop is trying toboot or may have booted, but the screen is not showing for some reason.
Beep tones and blinking lights tells the technicians what is going on with thelaptop and why it is not booting. Most times it's a motherboard issuewhen you hear beeps or blinking lights continuous.
If it seems like your system is running whereas you hear fans running, hear the hard drive running, see lights, heard the hard drive click during bootup, but there is nothing on the lcd screen then try the following: 1) Try hooking a external monitor to your laptop. It can be any type of monitor even one of the old style fat crt monitors as long as it has a vga cable to connect to the laptop. There is a sequence of keys you might have to hit to get the display to show on the external. Most times you hit the FN (Function key) and hold it while you hit the corresponding F1 thru F12 key that is for display. Usually the correct key will say CRT/LCD or it might have a display icon on it. If the image displays on the external monitor that means the video card is good. 2). Remove the external monitor and reboot the computer again. Now when it is done booting take a flashlight an shine it on the lcd screen. You are looking to see if you can faintly see the icons on the screen. If they are there but barely visible then the LCD Inverter is bad. The LCD Inverter is located at the bottom of the lcd screen just above the keyboard and the Strip around the lcd screen covers it. You'll have to take the lcd apart to get to it. 3) If you don't see anything when you shine a flashlight on the desktop, then the lcd screen has to be replaced. However, sometimes the cable on the back of the lcd screen has come aloose or just needs reseating, so unplug the cable and put it back then see if it shows an image.
Read Below if it is not booting at all when you press the power button. Laptops don't boot for the following reasons: 1) Bad Power Cord. 2) Bad
DC Power Jack where the power cord plugs into the laptop. 3) Static
Charge Buildup. 4) Bad Motherboard.
The above 4 reasons are when
you press the power button and absolutely nothing happens. You hear no
fans running, no disk drive running, no one time clicking sound on the
CD Drive and No light for a second or two when the CD drives click. In
the case of a motherboard issue sometimes you will hear beep sounds or
see blinking lights. Those beep sounds and blinking lights tells the
technician what is going on with your motherboard and why it will not
boot. If you see the blinking lights or hear beeps count them.
So you have a power light which means your power cord and
dc power jack is good. So lets see if you have a static charge buildup.
the Power Cord and the Battery from the laptop, then Press and Hold the
Power Button for 30 seconds. After 30 seconds put the power cord back
into the laptop, but leave the battery out. Press the power button to
see if it boots. If it does you had a Static Charge Buildup and it's ok
to put your battery back in. If it does not you more than likely have
an issue with your motherboard.
I would suggest to first determine that your monitor is OK. If you are using a notebook try connecting an external monitor as well and see if the same random (monitor switching off problem) happens with this monitor. If you have a desktop try connecting a different monitor.
If the same condition happens with a different monitor try updating the drivers for your video card.
In 19 years of working on computers I've seen 1 bad Intel CPU and it still worked it just showed the wrong processor speed. I'd eliminate the CPU being the problem. Generally if you have a bare system with motherboard, ram, keyboard and video and they turn on the system is good. The video may cause a crash if it's bad somewhere in the bootup process going into windows but it shouldn't stop the initial bootup process. The area I would likely suspect is the hard drive. If the arm inside the drive that controls the heads is loose it can cause the drive to read sometimes when cool and then to start slipping and not read when the system is warmer. If you can get into the bios there should be someplace there to check your temperatures and voltages. Those might be a suspect area. If the power supply isn't delivering the proper voltages or the CPU is getting hot could cause problems also. I'd like to hear more about what you're seeing on the screen when this system fails to boot. Does is show the ram countup, system devices and hard drives as detected in the bootup process? Or is the screen just blank. When it doesn't boot does the hard drive light blink continuously?
Hi, when connected to a portable you sometime must hold function key then press F5 or F6 to switch between the portable screen and the aux monitor, have you tried the monitor with another computer. If this does not work, it might require internal repairs...