Emachine w3507 blue light only comes on fan runs nonstop, no signal or monitor, pressing the f8 did nothing

On most PC's, shut down your machine, wait a minute or so, power it back up and start tapping the F8 button until you see the prompt for safe mode.

This isnt a one step fix. Power off unit then while powering on tap F8 key to get menu with option to boot to safe mode. If this works could be a driver or malware issue which can sometimes cause windows to come up in safe mode but not normal mode. This is only a start not a solution.

u ahve problem with your display setting or display is not working properly

if your able on your computer that on destop screen click right butone of mouse from there properties then settings there will display setting

screen resolation 1280 by 800 pixels

color qulity highest (32bit)

try this hopw fully proble will be solve

start ur computer press F8 rapidly if popup menu came then goto safe mode,if not then u have a problem in ur ram.but u say its giving no signal thats mean vga resolution may be not compatable with ur monitor.go to safe mode and remove ur vga driver and restart ur pc if u have a vga problem.
still u facing a problem then better chage ur ram

First when you power up the computer press F8 key then enter in enable vga mode.
If you are able to enter then go to start menu->control panel->display property ->settings.
Change screen resolution to 1024*768 then apply and ok.
But if you are not able to see safe mode and other menu.
Then open cpu cabinet .
Refix RAM memory.
Pull cmos cell from motherboard for 10 minutes.
Reattach all connection harddrive.
Open processor fan and processor remove dust from all parts.
Make sure motherboard is not ground with cabinet.
Remove PCI cards if any.
After all above still same then change RAM then try.
Let me know if you need further assistance.
Thanks for using FixYa.

It sounds more like the computer isn't starting up. The "no signal" message is coming from the monitor itself to tell you it's on but there's nothing coming in to display. Normally no special drivers are required for the monitor, and you'd see at least the computer maker's splash screen and BIOS messages if the computer was starting up properly.

You'll need to determine what is keeping the computer from starting up. Make sure it's getting AC power and that the power light comes on when you press the front panel power button. You may need a power supply. If the computer comes on but doesn't boot you may have memory problems or trouble with the motherboard. But your monitor is working properly.

u have problem of disaply scren resolutio for that

when u power up the computer press F8 key then u see safe mode and other menu
then enter in enable vga mode .
then u can change screen resolution to 1024*768 in dispaly property

Remove and reinstall memory.

Check all power cables plugged into M/board if these are correct
remove all hard ware
hard drives / cd player and anything else
except for video and memory and test to see if it boots. If it does, one of the removed hardware is faulty if it does not then you have M/board failure

when ur starting the tower and it light are on and ur fan there is no problem with the power supply, i think that u rily need a new motherboard because ur board will not boot on start up..