M-series gateway (m1629) press start button, nothing

You may have corrupted BIOS. If so, you need to download your BIOS to a flash drive and try to recover it. Some Gateway users have seen this with the Insyde BIOS. See: http://forum.notebookreview.com/gateway-emachines/589067-gateway-nv78-insyde-bios-recovery-filename-hangs-bios-splash-screen.html

Robert. You have a bad water valve OR completely clogged up filter screens on the valve. My past experience with this machine with this type of problem is to replace the valve assembly. part Number W10364988

your screen is probably dead, plug it in to another screen and press the FN and screen direction button.

Have you seen THIS YOUTUBE Link? He has a "M Series" like you...

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gateway series No video Fix Black Screen

Step one: Perform a partial reset

1. Disconnect the power cord from the product.
2. Press and hold # and 3 while reconnecting the power cord to the product, and then release both buttons.
3. Try making a color copy by pressing the Start Copy Color button on the product control panel.
   

Step two: Perform a semi-full reset CAUTION: Performing a semi-full reset deletes any saved phone numbers on the product.

1. Disconnect the power cord from the product.
2. Press and hold # and 6 while reconnecting the power cord to the product, and then release both buttons.
3. Try making a color copy by pressing the Start Copy Color button on the product control panel.

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.

Restart the PC and get into SAFE MODE. Hit and release F8 many times right after turning on PC. If it works, then go into your video setting and either change the settings or remove the video driver. Restart the PC and you'll get 800X600 screen, then reinstall the video drivers. IF it won't go above 800X600, screen internals are bad, LCD toasted. I've seen that happen with LCDs and older monitors.

first press & hold power button for 6 second then again press power button to boot...