My computer gives continuous long beep on boot. No display on monitor.

Hi...
Gives continuous beep sound , When my laptop switch on (Lenovo G585). No display but leds (power & battery) were blinking.

The beeps in your computer at boot up mean that there is an hardware.
Every number and lenght of beep is a code that indicates where the error is. You should refer to your producers webpage to "translate" the code in the cause of boot failure

This is likely a result of the computer not recognizing the monitor. During the POST test during startup,the computer will check for a video output. It can range from the video card failing to just not having the monitor plugged in. I would check you connections, perhaps try a different monitor, even a television that has either HDMI, DVI, or VGA input. If that does not fix it, it is likely your graphics card or on board graphics from the motherboard. Is there anything new since the last time the computer worked? How old is your PC?

If it seems like the computer completed the boot process but the screen is blank, try the steps below.

The problem will either be the monitor or the video card inside the computer. Connect another monitor to the computer to isolate the problem. Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor displays and works ok, then your original monitor is bad and the video card is good. If the Borrowed monitor does not work then the video card inside the computer is bad.

If the computer did not complete the boot process then try the steps below.

When you plug in the power cord is there any lights whatsoever on the laptop, where the plug goes in or on the AC Adapter of the power cord?

When you press the power button do you hear fans running, hard drive spinning, lights on the computer, hear any beeps or lights constantly blinking, hear the DvD/CD drive click and the light on the drawer of the DvD/CD turn on for a second or two? If so the computer is trying to boot 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 the laptop and why it is not booting. Most times it's a motherboard issue when you hear beeps or blinking lights continuous. Most times the problem is with the memory or Video Card. Count the Blinking Lights or Beeps and take note of their pattern (1 Long or 1 Long followed by 2 Short).

Maybe you have a Static Charge Buildup. Remove the Power Cord, then Press and Hold the power button for 30 seconds. After 30 seconds plug the power cord back in and hit the power button to see if it boots.

Maybe your memory is bad or the memory slot is bad.

Remove the Power Cord, Open the Case and remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.

Well, if it was faulty it would detect it on POST (power-on self-test)
and beep. So, you could start by making sure that your display monitor is working ok by plugging another system or laptop into it, or plugging a known good monitor into your barebones system.
It's only a start, I know, but you have to know that the display works and not just assume it does.
Regards,
nicam49

1.power supply
2.memory cards
at last mother board need changing !
hope it will help

Normally you will get beep sound at booting if you have a problem with your video card or under some circumstances with your screen.

Try to plug an other monitor on your computer. If it works than probably your monitor is in problem.

or

try to plug your monitor on an other pc. If it works than your computer video card is the problem.

Hope it will help
Dan

The beep codes below may help you identify the possible computer problems. However,
they are only for reference purposes. The situations might differ from case to case.
gAMI BIOS Beep Codes
*Computer gives 1 short beep when system boots successfully.
*Except for beep code 8, these codes are always fatal.
1 beep Refresh failure
2 beeps Parity error
3 beeps Base 64K memory failure
4 beeps Timer not operational
5 beeps Processor error
6 beeps 8042 - gate A20 failure
7 beeps Processor exception interrupt error
8 beeps Display memory read/write failure
9 beeps ROM checksum error
10 beeps CMOS shutdown register read/write error
11 beeps Cache memory bad
g AWARD BIOS Beep Codes
1 short: System boots successfully
2 short: CMOS setting error
1 long 1 short: DRAM or M/B error
1 long 2 short: Monitor or display card error
1 long 3 short: Keyboard error
1 long 9 short: BIOS ROM error
Continuous long beeps: DRAM error
Continuous short beeps: Power error

You really aren't giving much info, so here are some beep - codes, also make sure nothing came loose on the motherboard or other components ( do this ONLY if you know how ) Safety first.

BIOS Beep Sound core list

AWARD BIOS

1 short(Beep) System booting is normally.
2 short(Beep) CMOS setting error
1 long - 1 short(Beep) DRAM ERROR
1 long - 2 short(Beep) Display card or monitor connected error
1 long - 3 short(Beep) Keyboard Error
1 long - 9 short(Beep) ROM Error
Long(Beep) continuous DRAM hasn't inset correctly.
Short(Beep) continuous POWER supply has problem.

AMI BIOS

1 short(Beep) DRAM Flash Error
2 short(Beep) DRAM ECC Check Error
3 short(Beep) DRAM Detect Fail
5 short(Beep) CPU Error
6 short(Beep) Keyboard Error
8 short(Beep) Display card memory Error
9 short(Beep) ROM Error
1 long - 3 short(Beep) DRAM Damage
1 long - 8 short(Beep) Display card or monitor connected error

most likely the ram needs to be reseatedor replaced.