I have an acer power fh and i am not getting any video when i boot up. i have reseated the ram, replaced the power supply, reset cmos, blown out the dust, all fans are working. i don't hear any beeps on start up and my keyboard and mouse didn't seem to be responding so i changed them and they do light up now but still no video. i also have a pci video card and tried using the integrated one and that didn't help. i can't get into bios or safe mode. when i repeatedly press f8 there is are no beeps. i have run out of ideas and don't know what to try no. PLEASE HELP ME!!!
thanks in advance
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Re: NO VIDEO OUTPUT
When you changed the power supply did you also plug in the 4 pin video power plug ( if your mobo has one)?
Take ALL the components out of the computer except the PS cpu and cpu fan. Clear your CMOS and turn on the machine to see if there are any error codes. Long Bios beep would indicate no memory at this point.
If no beeps go ahead and put the old PS back in...just in case new one was faulty and only running one rail.
If no beeps then yeah I agree mobo and or cpu is dead.
Sounds like a dead motherboard, i had the same problem a while back, with my custom built pc, that or try a new power supply. but i'd say it was the mobo though. a new one cost as cheap as 40 bucks i'd say depending on what your hardware is, you friendly neghborhood pc shop can help you, fyi, build your own pc its cheaper!
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There are several reason why a computer won't boot up. First you need to figure out if your Power Supply is working, if your not a computer expert, you can try another PSU to test. Or you can use a PSU tester to test if your PSU is still working. If not, clean and reseat your RAM, if you have 2 RAMs, remove each RAM then try 1 RAM at a time, and try to seat the RAM to different slot. If not luck, clean and reseat your graphics card. If you have a built-in video port, remove your graphics card. Still won't boot? try resetting the CMOS. This might fix the problem.
Computer does not boot up The problem maybe the RAM, it is faulty or just needs reseating to make proper electrical contact. Reseat the RAM and then boot up your laptop. If it still does not boot up then remove the RAM module/s and take them to your friendly computer repair shop and get them to test the RAM for you.
Try reseating the ram modules, and the video card if you have an external one. To do this, open the case and locate the ram, they're long green sticks with black squares on them, to remove them, depress the taps on both sides and reseat them in their port. Then look for where your monitor plugs in, if its a removable card, try removing it and inspecting it for obvious damage, replace it and see if the machine boots. If possible, try swapping the video card with another one from a working computer to narrow down the problem.
There are different possibilities for system hang up. I want you to find it your self from following my simple instruction.
1. (when computer is turn on) Check temperature... overheating can cause system to hang up, it can cause the system to reboot, it can cause the fatal error message and turns your screen to blue. Overheating is cause by exhaust fan or blower not working. Find this blower or exhaust fan on top of the processor, as built in fan in your video card, attached on your power supply and on the casing of your computer. Replace non working fan or blower.
2. Check video card...faulty video card can cause your system to hang up. It can cause also your system to go on blank screen. Most common problem is loosen connection of video card from the motherboard. Disconnect and reseat the video card properly. Inspect the fan, if not working then video card will overheat and system fail. If you previously see moving colors in your screen especially small boxes, or discoloration and screen going black and white then it means video card is already failing. You will need to replace it.
3. Check for hardware failure. keyboard, mouse lan card can cause your system to halt and hang. You will need to disconnect this first when booting and see if by removing this hardware will complete the system to boot up to operating system. Replace faulty one.
4. Harddisk failure. when computer reset or will not boot up completely then hard disk usually cause this problem. Initial remedy is to reseat its connection sata, ide or power supply connector. If you hear ticking sound in the harddisk or excessive vibration then it will need replacement.
5. Operating system corrupted. this can cause your computer not to boot up properly and hang the system. Reformat and reinstallation of operating system is required.
6. Power supply failure. you need to check the output voltage. dropping of voltage can be cause bi leaking capacitor in the power supply unit. replace it with exact value. Voltage should read +12VDC for yellow, +5VDC for red. and should be stable even with load.
yeah... it is definitely a mobo problem. but try to reset the hardware by just removing the RAM modules and inserting them back. To do it well, remove the ram modules, then turn ON the device. if mobo is ok, the device should beep. if it doesn't beep, turn it OFF and put back the ram. the mobo is defective
More than likely the power supply you bought isn't capable of handling the wattage demands of your system. If you do not get ANY indication from your video board (i.e. boot information), chances are the power supply is either too low on wattage output or it's defective.
To determine if you have a faulty LCD screen or a faulty video card, connect an external monitor to the laptop's video port, power up the external monitor first the the laptop. The video output should automatically switch to the external monitor. If you get a normal image then the video card is OK, and the fault is with the LCD screen.
If you still get a bad image, then the fault could be a faulty video card or video RAM. Most laptops use part of the main RAM module for video RAM, try reseating the RAM modules and or test the RAM modules. If the RAM is OK then the fault is the video card.