Short board detection DAG7BJMB8C0 REV.C

[karlox]

Good morning, I work on a HP motherboard, with a power problem, replace a pair of AOE6936 mosfets that had shorted, a failure of the integrated RT366AC, where the track 28 (VIN) is damaged (attached image) and where I have the doubt of the line that is just above it and making the measurement marks me short, and it is where I can not determine if the fault caused that it reached a GND layer of the card and on that line was the line (VIN) looking at the card more incidents of short on the line (VIN) I found the integrated (EM5209) attached data sheet and where the lines 1 and 2 that carry (VIN) are integrated. , The line 28 of the RT366AC I do not know where it comes and if it is only that the enamel of the card has discovered its existence or I have short on that line but should not have short on all lines VIN) ahH! to replace the mosfets and make the bridge of the IC RT366AC (28) to the capacitor, turned on the team, without video signal, but returned to make the short the mosfet's AO6936 and that is why the doubt. I found diagrams similar to the model, but do not correspond to any integrated of this model. thank you

[karlox]

Re: Short board detection DAG7BJMB8C0 REV.C

Thank you, I removed the IC RT366AC, and kept digging, I found the GND layer, there is no short in VIN. The problem was the confusion with believing that there was part of track 28 left over, but rather it was that the fault removed the enamel that protects the logic card. Thank you, I will cover my scrapes and put a bridge. :violín:

[Sephir0th]

Re: Short board detection DAG7BJMB8C0 REV.C

Usually a shorted (Dual-)Mosfet in the area of the CPU doesn't end well, regardless whether you replace the circuit or not.

However, if you want to try anyway. You need to cover the exposed GND plane again with solder mask and to rebuild the VIN track to the controller in combination with replacing the whole buck converter, so all Mosfets and the Driver/Controller. Good luck.