just replaced the screen on a clients laptop. Computer was working just fine, then after I replaced the screen, nothing happens at all. External display shows nothing, the laptop power light and charging light comes on, but the fan doesn't start spinning, nor the HDD. Just no response whatsoever. RAM is fine, screen is fine, HDD is fine. Power is at proper current and battery is doing just fine. Pretty sure motherboard is fried, but wanted to ensure.