I have two dead GPU at hand, is there any tutor on how to fix this GPUS? Someone told me GPUs have fuse on them but I don't even know how their fuse looks like, they aren't like fuse you would find in every other electronic parts, any tutorial link?
If the fuses are on, then there is a short circuit on the video card. Without experience, you will not be able to subordinate the video card yourself, and you also risk burning your motherboard.
Better take your video cards to a workshop or find a private technician in your country who will diagnose video cards.