Started happening after I replaced ram; reinstalled original modules; did not help situation
ThinkCentre Desktops are very picky about installation of every part. (Your replacement RAM was probably too fast, such as 1600 instead of 1333.) Also, the long product ID numbers on the RAM chips must match.
First, WITH POWER DISCONNECTED, ensure the RAM is seated properly. If the RAM sticks are different brands, switch them in the RAM sockets. If you have 4 sockets, socket 0 (is the first socket) is nearest the processor socket.
OR
Remove the RAM and clean the gold fingers with a soft, lint free cloth. Then use compressed air to ensure no debris is removed from the RAM sockets on the mother board.
BobB
SOURCE: Amilo L7310GW will not boot up
Can you try switching on without the wireless mini pci card . but exercise care while disconnecting the thin two wires named MAIN & AUX from WLAN card .It is easy to remove this and you dont have to disassemble the entire notebook for this
SOURCE: Laptop running hot - Fan cycling on and off every 10-20 seconds
My guess is that CPU fan, it there is one, is not working properly and your computer is heating up. Is it turning off, too, occasionally after a period of time? Suggest a new CPU fan.
SOURCE: compaq c500 blank screen, can heard hard drive running
You should replace the power supply, and clan out dust, and tighten connectors
SOURCE: blank screen long beep 2 short beeps at startup.
The 1 long 2 short beep code means a problem in the video circuitry and the laptop can't initialize the display. This is usually caused by failure of the integrated video chipset. Unfortunately, on a laptop you can't just open the case and install a new video card like you can on a desktop. You need to replace the mainboard. Replacements are available online. Here is one source found by a Google search. (I'm just using this as an example. I haven't dealt with this site.)
The 4 beep code means no memory detected when the computer started up. No surprise there since you had taken it out.
SOURCE: HP Pavillion dv6700 - black screen
Do the following without the battery inserted.
Let the computer sit with no battery for 24 hours. Do not put the battery in at all. Try using your original memory stick ONLY, with no hard drive and see if it will POST. If it does, insert the hard drive and try again. Could be the new memory...
Another thing you can try is reseating the processor. Turn the ZIF screw, take the processor out (WATCH THE PINS!!) and put back in GENTLY. Leave the memory in the computer, hard drive removed, try to power on.
These models have been known for bad motherboards. Contact HP and arrange to send it in. If you do enough digging on HPs website, you'll find the service advisory.
-Dell & HP Certified Technician
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