Chi Mei M236H1-L01 C2 Blown Diode Acer 24"

[nubie]

Due to some moisture the VGHP/HVS1 line shorted and this diode D8 blew. The picture is there. It just fades in after some minutes and is quite solarized. Updates again take minutes.

Any idea what Dioide to use? Thx.






Many thanks

[lotas]

More likely the same as D3 (A7).

[nubie]

More likely the same as D3 (A7).

Thank you! I'll try that.

[lotas]

Marking A7 is BAV99LT1.
Here is a boost converter circuit consisting of diodes and capacitors; the capacitors also need to be checked for low and short resistance.

[nubie]

Marking A7 is BAV99LT1.
Here is a boost converter circuit consisting of diodes and capacitors; the capacitors also need to be checked for low and short resistance.

I really appreciate it! I doubt any of the other components are damaged. If you look just under the place marked HVS1 is where the short took place, it was moisture trapped under a plastic shield, those contacts completely oxidized and melted the plastic shield.

[lotas]

Yes, I saw that you have shorted the VGH signal (+22 - 24V) to ground (GND).

[nubie]

No short was found in that circuit. One leg of diode is 12v, the other is 8v, the output is 0v

[lotas]

Well then, clean off the carbon deposits under the burnt diode and solder a new diode and check.