What missing laptop motherboard part could be causing black screen?

Testujeen
Testujeen Member Posts: 2 New User
edited November 2023 in 2020 Archives
2 months ago, my acer helios 300 suddenly died while I was using photoshop.. No led when plugged, completely dead.  So i brought it to a repair center.. more than 50 days after, the laptop is still not turning on. The next day when i called them,  they told me that they removed a component on the motherboard and the laptop is now charging but when they turn it on, the screen remains black,  so they need to change that component. I ask them what component was it,  they refused to tell me. It's been two week now, it seems  they can't find the component they are looking for. ( am in west africa there is no acer repair center in my region) 
So my questions are : can i trust them? what could that component be?  And where can i buy one for my laptop? Thanks