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what king of monitor you have., crt or LCD, does the monitor led indicator has a green light, is there any beep when starting the cpu? how many beeps you have heard when the cpu was starting?.
if there is no led indicator light in you monitor the posibilities of that is the monitor was the problem. solution: try to check your plug in monitor if it is properly inserted in the power plug or in the vga plug correctly.
if when you power the cpu and your monitor led indicator, turn green and back in the standby mode. listen to the beep sound of cpu if theres any. solution: try eject the mem card. in the slot and clean the contact with the eraser. and put it back into the slot again after you clean it.
actually if u repair an aoc monitor alone without getting connected to cpu once u switch on the monitor all led's will lit on ( green light ) it will remain on situation until u connect the vga connector to cpu that's the time led's will lit off and only the power led will remain in green condition.some aoc 5en once u power on power led is in green condition and if not connected to cpu it will be in orange condition.hope u get some idea but i am not sure if it will work with ur monitor. but as long as LEDs lit on i think no problem with ur monitor.
The problem is the board on the case's display. It has temp alarms for your components(video card, hdd, cpu), there are temp probes for you to set so you can monitor these temps. However the board that controls these functions, or at least mine and many others I have read about, is defective. It will change display constantly and sometimes have garbage display. It is setting its own limits for what is considered a hi temperature. The limit it has set for one of your components is < room temperature so it thinks you are having an overheating problem. You can manually set the limit for overheat and it will fix it for a while, but it will prob happen again.
Is it POSTing? Do parts make noise and then theres a Beep? The beep means it finished the Power On Self Test. Once it posts then it will show splash screen or black screen with it testing hard drives disk drives etc.. If no post is the led lit that says A/C is connected? before you attempt to turn on? If no post and good ac to rear connector then you probably need a new motherboard.
motherboard problem motherboard can't display when switch on, the cpu fan faster no beeping . I had change power supply, but same.Check the keyboard LED,Not flash.I had remove the ram but can't hear beep. PC speaker ok conferm. Monitor display tested monitor its ok . But no comming display. Can you help me? How i can solve this problem?
you have an issue of no display and as you see that u are betting the knocking sounds, could u plzz let me know are you getting these sounds when you power on the computer with the Fn and the power button, if you are able to listen to the sound but there is nodispaly then its a no video issue . in order to determine whether its an issue with the LCd you can connect an external monitor to the laptop and power on the laptop then hold the Fn key down and then press the F8 key and release both the but keys, look for the display on the m#external monitor , toggle the keys a couple of times , if you are able to see the display on the external monitor and not on the LCD , then u have to open the cover above the keyboard (hinge cover) and reseat the LCD cable, if there is still no display then the LCD has to be replaced.
we have different sound we can hear in cases of hardware problem, once the video card has loose contact it also beep continously, a beep sound also occurs when the ram(memory card) loose contact, one beep sound when it boot clearly it proceeds as go signal going to operating system. if you are using an upgraded video card remove temporarily and use the on-board from your motherboard. in case that it won't boot and still you hear a beep, beep ,sound then, switch-off the power take out the memory card clean the contact points(bronze color) with pencil eraser, make sure that no remaining residues of eraser remained before you install to the slot. i hope that this solves your problem
1. Make sure the monitor cable is fully plugged into the computer.
2. If the new monitor works fine, The connection between the previous monitor and the PC was bad. Reconnect the original monitor to the PC and make sure that the connection is snug. Tighten down the video connectors until they are snug. Try again.