I have a Dell Inspiron 5160 laptop. Was working fine, but now does not power up at all. When plugged in, I touch the power button and all three lights blink green for a fraction of a second. THen only the light on far right blinks ten times yellow/amber. Nothing else happens. What does this mean? Is it the power cord that's the problem or the internal battery? If I remove the battery I get nothing at all. I do not have a spare power cord or battery to test this further. Any advice? I've done some searches and see that this is a problem with 5100 Dells, but I can't seem to find a thread that will take me in the direction of correctly diagnosing the problem with my machine (and I need to fix this asap!) Thanks.