I'm saying this as polite as possible, sorry in advance if I offend you but...
What in the heck are you talking about?

The chip having a red light is just saying its powered on. The green pulse is the chip trying to glitch the console.

If you can't even run Xell, you might need a trusted seller, because I don't think you know enough to fix it.
Edit; I read that E74 could be a cold solder joint near the NAND. If you RGHed your console, check where your nand is. If you don't understand that, send it to a pro.

Next time try English.. Anyway [ Register or Signin to view external links. ] . You can go a few ways about fixing it, a reflow done professionally is your best bet but you could always try [ Register or Signin to view external links. ] . It's a cheap quick fix but is in no way a permanent or even so much as of a healthy fix for the console. This error is common in the old motherboards. Some people constantly overheat their xboxes by using the towel trick and others use a heatgun to reflow it. Neither of which are good nor permanent fixes and only seem to cause more harm than good most of the time.

chevyrydinhigh2 wrote Next time try English.. Anyway [ Register or Signin to view external links. ] . You can go a few ways about fixing it, a reflow done professionally is your best bet but you could always try [ Register or Signin to view external links. ] . It's a cheap quick fix but is in no way a permanent or even so much as of a healthy fix for the console. This error is common in the old motherboards. Some people constantly overheat their xboxes by using the towel trick and others use a heatgun to reflow it. Neither of which are good nor permanent fixes and only seem to cause more harm than good most of the time.

DONT USE THE TOWEL TRICK

E74 is a hardware issue so you will most likely need to send it to a professional. don't send it to microsoft (obviously)