Re: Dell U2413 turning off

So replacing the two thyristors are the answer for this problem. Q971 and Q972. Unforunately the original MCR part had a non-standard arrangement of Gate, Anode, Cathode (K) leads, and there are none I could find with the correct order, so you MUST bend the pins to have the right one go to the correct hole on the board, changing the Littlefuse Thyristor from KGA pin order to GAK order to match the original part - you CANNOT use the default arrangement.

The replacement part you want is Littelfuse S4X8ES2, and mouser.com has them for a 45...

Re: Dell U2413 turning off



Meant to say Q971 and Q972. Won't let me edit......

Re: Dell U2413 turning off



Q971 and Q971 are likely the problem. Gated thyristors that have become too sensistive....

Re: New Members - please post your introductions here

Came here to post the types of caps that are generally bad in Samsung 2220wm monitors. Had another one dead today. Samsung sucks. Don't need anything, just posting to help out the next poor sod with a unresponsive Samsung 2220wm with a flashing blue light.