Gateway 400SD4 won't power up

Try holding down the power button instead of just pushing it. I had this problem with my HP dv7 and holding the power button down for around 5 seconds worked for me. Also make sure that its plugged in to a power source.

try rebooting your coumpter is in sleep mode it takes a long time but you will get it back on .... keep pushing the power button aventally it will start up

try this

Manual reset methods several EPSON Stylus Color. Actually there are two methods to reset epson printers counter, that is using software resetter such as adjustment program or SSC service utility or using manual by combination pressing button on the printer. If Reset using software resetter you can follow the way of usage the software but sometimes software resetter for the printer is not available. The only way to reset the printer if software resetter not available you can use manual reset.
The Following manual reset for some EPSON Stylus Color Printers:
1. EPSON Stylus Color
Pressing and holding ALT+FONT+LOAD+PAUSE buttons combination
press POWER button
Release all buttons
2. EPSON Stylus Color 300
3. EPSON Stylus Color 400, 600
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button and hold it until you will see blinking INK OUT and PAPER OUT leds
Release all buttons
In 2-3 seconds time press LOAD/EJECT and CLEANING buttons again.
4. EPSON Stylus Color 440, 640, 740, 460, 660, 670, 760, 860, 880, 1160
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and hold CLEANING button, until all leds will blink.
5. EPSON Stylus Color 680
Pressing and holding LOAD/EJECT and CLEANING buttons,
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and hold LOAD/EJECT button, until all leds will blink.
6. EPSON Stylus Photo 785, 895
Pressing and holding Maintenance and Roll Paper buttons
press POWER button, You will see blinking Error led.
Release all buttons.
In 2-3 seconds time until led is blinking press and hold for 10-12 seconds Roll Paper button, until all leds will blink.
7. EPSON Stylus Photo 890, 1280, 1290
Pressing and holding Maintenance and Roll Paper buttons, press POWER button, You will see blinking Power led
Release all buttons
In 2-3 seconds time until led is blinking press and hold for 10-12 seconds Roll Paper button, until all leds will blink
In 2-3 seconds time press LOAD/EJECT and CLEANING buttons again.
8. EPSON Stylus Color 800, 850
Pressing and holding LOAD, CLEANING Color and CLEANING Black buttons
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and release CLEANING Color button, You will see leds blinking.
9. EPSON Stylus Color 900, 980
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button, You will see blinking INK OUT led
Release all buttons
In 2-3 seconds time press and hold CLEANING button for 10-12 seconds.
10. EPSON Stylus Color 3000
Pressing and holding PAUSE, LF/FF and DOWN ARROW buttons
turn on printer.
Release all buttons.

Remove battery, press and hold power button for 5 seconds and then put back in to see if it starts. If not, power supply is most likely faulty

Is the cell still in there ? if the battery is bad, the PS will not provide the charge, plus running the computer .try your pc without the cell pack. Only the power supply connected
Hope this help. keep me posted if not

"Turn off computer and unplug power cord. <br>Disconnect all external devices. <br>Remove the battery. <br>Press power button and hold for 10 to 15 seconds. <br>Plug power cord back into computer and press power button. <br>Check front panel LEDs (lights) on bezel (front face) or optical drives and listen for power supply fan. <br>If LEDs are on or power supply fan starts spinning, watch for boot screen on monitor. <br>If computer begins to start, turn it off. <br>Reconnect any external devices. <br>Press the power button and make sure the computer starts.
Please save this steps and go through that. If in case you require further help, you need to contact Answers by Gateway department which is a paid support. The phone number for Answers by Gateway is 1.800-237-6483. Or please consider contact with a local technician for a detailed troubleshooting."
worked for mee!! good luck

Faulty Battery.
Get a new one.


If that is not the problem check the ram.

theres prob something wrong wif the bulb

You should try plugging in an external CRT or LCD monitor. Most laptops will automatically enable this port when you connect a monitor and reboot, but you may need to hit some combination of keys on the laptop if you don't see anything.

You should try this to see if the laptop is running properly other than the internal LCD or VGA hardware.