SOURCE: amber light on power button
Check to see if there are any loose connections to the memory cards on the memory board. Make sure the data cable to the drives are connected properly. Is the fan in the power supply on?
SOURCE: will not pwer up. Greenlight blinking on back
The green blinking light can mean there is a problem with the power supply.
Try unplugging the computer from the wall, and turning on the pc on switch.
After a few minutes, try plugging it back in.
If that does not start things up, you may have a bad power supply.
If the power supply is bad, these models take standard power supplies. You should get an ATX 350Watt or higher power supply.
They are easy to replace, unplug the power from the wall, disconnect all the cables inside the computer. Unscrew the four phillips screws outside the back of the computer where the power supply is attached to the case.
Remove and replace.
If you don't feel comfortable with this, a good local computer shop can help you out.
SOURCE: HP Compaq Presario SR1820NX will not turn on
i worked for hp and compaq it is well known issue to reslove this issue
1#turn off the computer and uplug the power cable from the computer and then hold the power button for 20 second then turn on the computer and the momment you back to desktop screen
go to download driver from hp site and here is the web site http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=pv-43507-1&lc=en&dlc=en&cc=ca&lang=en&os=228&product=1841849 and restart the computer .
SOURCE: Press power button. Green light turns on, fan
there is power buttom on the keyboard makes it wake up. try it
I’m happy to help further over the phone at https://www.6ya.com/expert/mustafa_06f84c65ab5cc745
SOURCE: gateway dx 4820 power up problem
Let's start with some of the basics.
1) Since you were checking connections on the motherboard, was the power unplugged from the computer, AND did you follow Anti-Static precautions?
[Anti-Static Precautions:
Your body carries Static electricity.
Static WILL fry out (Short Circuit), the hardware components inside a computer.
You may not even see it, or feel it.
Computer unplugged from power, computer case open, computer on a table.
TOUCH the metal frame of the open computer case to relieve your body of Static.
Should you get up in the middle of working on your computer, and leave, upon your return Touch the metal frame again.
Or use an ESD wrist strap, and connect the alligator clip to the metal frame ]
2) Computer unplugged from power, anti-static precautions followed, remove all ram memory modules, and reinsert them. In fact, it would behoove you to clean the contact pins on the bottom of the ram memory modules, before reinserting them.
Clean with a pencil eraser. Remove the eraser dust, with air pressure from a can of compressed air for computers, or air pressure from your mouth may be sufficient.
You may have bumped the ram memory modules.
Even if they look to be seated, it only takes a few minutes to remove, and reinstall.
After time, corrosion can develop on the gold plated contact pins, at the bottom of the ram memory modules. Doesn't take long to clean them with a pencil eraser.
Handle the ram memory module by the body. The body, is coated with a clear see-through protective plastic.
http://en.wikipedia.org/wiki/File:Generic_DDR_Memory_%28Xytram%29.jpg
The above link, is only provided for an illustration of the gold plated contact pins, I am referring to.
It is DDR Sdram ram memory, and has 184 contact pins. 92 on each side.
Your computer uses DDR3 Sdram ram memory.
Has 240 contact pins. 120 on each side, and the Locating Notch is in a different place.
3) Are you sure the 4-pin ATX +12 Volt power cable, is plugged in tightly to the motherboard?
http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4
This is power for your Processor.
http://support.gateway.com/s/desktop/2009/gateway/dx/dx4820/DX4820nv.shtml
SATA power cable is plugged in tightly to your SATA harddrive?
http://www.playtool.com/pages/psuconnectors/connectors.html#sata
If your SATA harddrive has provisions for plugging in a SATA power cable, and a 4-pin Peripheral power cable, BE SURE that only the SATA power cable is plugged in.
Plugging both in will fry out the harddrive. Maybe not right away, but will down the road.
http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral
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