PC hardware--CPU & Motherboard & RAM/HP laptop won't boot

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Question
QUESTION: I have a HP laptop with i5 processor, 2gb ram.
Now the screen shows nothing, not even with external monitor.

Caps and num lock leds are blinking three times which i cheked for the codes and it is for memory modules. But i checked the memory modules and they are working fine.

Any help would be appreciated!!

ANSWER: How did you check the memory modules? Did you check them with something that you booted to (Memtest for example)? The reason I wanted to know is, how do you know the memory is working correctly if the computer won't come on? I would say you could make sure the memory is working correctly by 1. Taking it out and putting it in a working computer that it is compatible with. 2. Running a program like Memtest. You burn it to a disk as a bootable disk and it tests the memory. (If your machine will not allow you to boot to a disk because of the problem this will not work).
Get back with me with more details.

---------- FOLLOW-UP ----------

QUESTION: yes i checked it by replacing it on another laptop. I also did the windows memory diagnosis which showed nio error.

Answer
Knowing that I would say that the video chip maybe bad. If the internal and external monitors show nothing and the blink code means memory, I notice if the lights blink 4 times it means graphics. I wonder if the code is just off. Being that you cannot see anything, therefore can't take any corrective steps yourself (plus, it is a laptop), I would take it to a computer shop or store and see what they say. Sometimes it is cheaper to get a new one than replace a motherboard in one.  

PC hardware--CPU & Motherboard & RAM

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Keith

Expertise

Experienced in complete system builds where knowledge of kinds and types of motherboards, processors, and RAM have to be compatible. This includes intermediate knowledge of video card technologies and the troubleshooting and repair of problems associated with said hardware.

Experience

11 years experience as a self-employed PC technician with 100% customer satisfaction.

Education/Credentials
4 classes from a Networking degree. Mostly self-taught.

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