When i boot up my computer i get no vga signal i got it from a friend and replace the old 1gb ram card and cleared and reset cmos and bios and get nothing. cpu fan and all other components seem to be working. could this just be a motherboard failure?
SOURCE: HP pavillion a800n pc wont' boot up..I get nothing...
After
much trial-and-error, I finally figured out the solution for this
common issue with certain HP Pavillion models. It turns out to be a
design flaw with the front-panel memory card
reader. Somehow the card reader's firmware gets scrambled, and it
prevents the computer from booting. You can test this on your machine
by temporarily disconnecting the card reader cable at the motherboard header. Voila - I'll bet you $1 that your computer will now boot!
The solution is buried deep inside this HP tech support document. The card reader firmware needs to be reset.
Here\'s how to fix it once and for all:
1)
With the computer power unplugged (duh), open up the case &
disconnect the card reader cable at the card reader itself - NOT the
end that connects to the motherboard header. Make sure the cable end is
not touching any metal components before proceeding to step 2 (another
duh).
2) With the cable still disconnected, fire up the
computer. The tech support doc says to let it boot into Windows and
stay there for about 5 minutes.
3) Shut the computer down and reconnect the cable to the card reader.
4)
Turn your computer back on - your memory card reader will work and,
most importantly, the computer will no longer hang at POST!
I
suspect that when you fire up the computer without the cable connected,
the card reader is designed to reset its firmware by grounding out
through the case - sort of like a CMOS Reset jumper on a motherboard.
I hope this solution is helpful to others.
best,
JohnB
SOURCE: Installed 1G RAM in DIMM 2 slot(correctly!). Not recognized
Do the two sticks match, all the way down to VENDOR?
SOURCE: HP a1610n BIOS gone
The check signal cable is for the video input/output..since it is a desktop swap out the monitor with one you know works. If it works then you know its the monitor, if not then it is the video card...that should take care of it..
SOURCE: cpu says no input vga signal, then goes to sleep
The no input VGA signal just means that the monitor is not receiving anything from the graphic card on the tower. Is the card a digital (DVI) output card? You'll know by the connector, it's white and slightly wider than a standard VGA connector. If so, perhaps the monitor is set to the wrong input?
If that isn't the case, and the computer is using an on-board or built-in graphics controller, you could try resetting the system's CMOS settings by setting the clear-settings jumper on the system board, or simply remove the plug and CMOS battery for a few minutes. Check the computer's documentation on the exact steps to do this.
Hope this helps!
SOURCE: Screen displays no signal and then shuts off.
try a new power supply if still same result change the motherboard sorry thanks and good luck
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