No display issue is not always easy to diagnose, even when we have all the information availabe in front of us.
Do these stpes one bu one to get it solved :
1. Do a full bios reset.
2. Differentiate between No-post and No-display as follows:
confirm the bios has completed its posting process during the boot-up, because if it hasn't then there won't be display.
Simple way to check that is to connect a USB keyboard, start up and see if the Caps lock / NUM lock LEDs react when you press the keys. If it doesn't then it could be a bios issue or a power sequence issue.
Then we check if the CPU coil has voltage (usually 0.8 - 1.0v). If it has the voltages, then the issue is bios.
If it doesn't have voltage then you have to find why the power sequence got interrupted.
If both those things are present then the issue is either with the display hardware (LVDS cable and LCS) or the GPU itself.
☺
Do these stpes one bu one to get it solved :
1. Do a full bios reset.
2. Differentiate between No-post and No-display as follows:
confirm the bios has completed its posting process during the boot-up, because if it hasn't then there won't be display.
Simple way to check that is to connect a USB keyboard, start up and see if the Caps lock / NUM lock LEDs react when you press the keys. If it doesn't then it could be a bios issue or a power sequence issue.
Then we check if the CPU coil has voltage (usually 0.8 - 1.0v). If it has the voltages, then the issue is bios.
If it doesn't have voltage then you have to find why the power sequence got interrupted.
If both those things are present then the issue is either with the display hardware (LVDS cable and LCS) or the GPU itself.
☺
