How come my monitor does not work when I add RAM?

by on March 29, 2011

Q: COMPUTER MEMORY MYSTERY (Can you figure this out?)

I have an HP Pavilion dv7-1245dx notebook computer that I’ve been working on for weeks with no luck. The computer runs fine when there is only one RAM stick (2.0 GB) installed. The stick has to be installed in the top slot (there are 2 – a top one and a bottom one) for the screen to turn on. If both sticks (both 2.0 GB) are installed, or if only the bottom stick is installed, the computer will boot (everything turns on) EXCEPT the monitor. It stays completely black. With this scenario the two lights (one next to the CAPS lock and the other above the number pad), the lights blink. When I go to put the top stick in, the computer boots and the light above the number pad stays lit (no blinking), while the CAPS lock light functions as it should (CAPS on or CAPS off). I have had the memory tested, the hard drive tested, and even replaced the motherboard. No change – screen still will not function with the two memory sticks installed. I did notice that the RECOVERY (D) volume has only 2.01 GB of free space, while the (C) volume has 258.49 GB of free space. When I look at my other computers, there is much more memory available in the RECOVERY (D) volume and the status reads “Healthy (Primary Partition)”. All I can figure is that there is not enough memory space available, but I do not know how to maximize the free space on the RECOVERY volume without affecting the (C) volume, as I don’t know if things will change globally. This may not be the problem, and it may be a setting I am not aware of, but would love to hear from someone who has some input. Thank you!

One Response to “How come my monitor does not work when I add RAM?”

    Hard drive space isn’t an issue with this. It sounds like a fundamental hardware problem, possibly with this specific RAM being combined with the motherboard.

    All I can suggest is to take it in to a computer repair shop so they can run a full battery of tests.

    A Laptop POST Card might be useful in determining boot up error codes if any are present: