memory bus termination regulator very hot

[clearchris]

So after recapping this msi mb, i still get no video, no post codes on my post card. So, I start feeling around, and everything is cold or very loghtly warm. The W83310DG is burn your finger hot. I look up the chip, it's a memory bus termination regulator. I let it cool, pull out the ram c hips, power on and the chip is hot in seconds.

Does this seem normal?
Do you think the chip is shorted?
Do you think there is a different explanation?

Thanks!

[kaboom]

Re: memory bus termination regulator very hot

Not normal.

Was it hot before the recap?

I'd check close for solder bridges on/near the caps you replaced, near the RAM slots. Check across the VTerm caps/bus for shorts with a DMM.

[clearchris]

Re: memory bus termination regulator very hot

I don't know if it was hot before, there were some obviously blown caps, so I didn't troubleshoot further at the time.

What does vterm stand for? My googling shows it is associated with memory, but it assumes you know what it is.

I don't see any solder bridges, and I cleaned up my solder job, so it looks decent.

I am considering taking it off of the board and seeing if I can at least get a POST out of the board. Would doing so cause damage? I will keep the ram chips uninstalled for the test.

It also looks like the chip may have been a victim of stripping the board of "not essential" caps.

[kc8adu]

Re: memory bus termination regulator very hot

no reversed caps?

[clearchris]

Re: memory bus termination regulator very hot

I wish. I just triple checked. They all face left or down.

I'm throwing in the towel on this one. For grins, ill get a new regulator at some point, but Im going to put an order in for a new board.

[tmiha71]

Re: memory bus termination regulator very hot

Missing information
- board model
- chip supply (3.3V ? 2.5V ? other ?
- memory type (DDR I or II or III ) ?
- what was recapped (CPU ?, memory ?, chipset ?)
- did board worked before ?

One blind guess - empty capacitor places ( + connection ) leads to output of W83310DG ( pin 4 ) - if it is so - they should be populated (not without upper information) ...