Asus GL703GM short

[retrorepair2]

Re: Asus GL703GM short

Just adding pics to make it easier to understand what I mean.

[retrorepair2]

Re: Asus GL703GM short

Only one showed up so here's the other

[jasko_jacker]

Re: Asus GL703GM short

if all components are working there may be a communication problem between the host and the bq24780s

[retrorepair2]

Re: Asus GL703GM short

I will check the schematic. I think maybe the BQ just needs replacing though.

New problem! I fucked up and bridged the drain of the first battery mosfet with the 5v side of the small resistor that sits under it as in the picture. Now the fans run full blast, all the time. I assume whatever controls the fans is now dead too.

I'll be throwing this things in the bin by the end of the week due to me making more of a mess than actually fixing it I'm sure

[retrorepair2]

Re: Asus GL703GM short

if all components are working there may be a communication problem between the host and the bq24780s

Just to respond to this, I don't think they are from the readings I posted. ACDRV is only 20v and CMPIN is only 0.6v.

[jasko_jacker]

Re: Asus GL703GM short

I think you should take out all the mosfets and the BQ24 (Before wasting unnecessary time) I'd try powering the card directly and test it with an operating system. This is to avoid that there are other problems that you do not see now. After that replace all components and the bq24

[retrorepair2]

Re: Asus GL703GM short

I think you should take out all the mosfets and the BQ24 (Before wasting unnecessary time) I'd try powering the card directly and test it with an operating system. This is to avoid that there are other problems that you do not see now. After that replace all components and the bq24

Isn't that a bit extreme? I don't know how I'd power it directly anyway (you mean the 1060 right?).

[retrorepair2]

Re: Asus GL703GM short

Do we think it may be an idea to clean the bios ME region? Seems a few of my problems seem like they could be related to that.

I've not idea really what it is or how to do it, would it be a non destructive way to rule something else out?

[retrorepair2]

Re: Asus GL703GM short

Can you share the full markings of your BQ charger IC?

A trick you can use is diode mode. Short the probes and meter will tone beep.

No power to the logic board.

Meter probe on ACDRV pin on charger IC.

Now probe all nearby black body resistors till you hear the beep tone. Part could be on the opposite side of the board. That part is likely to be a 4k ohm resistor.

What do you think of the readings since yesterday?

[mon2]

Re: Asus GL703GM short

Do you mean post #25?

[retrorepair2]

Re: Asus GL703GM short

Do you mean post #25?

I put the readings on post 19: https://www.badcaps.net/forum/showpo...7&postcount=19

I'm probably more interested in the shitting off issue at the moment though. I installed windows 10 on another laptop and then put it in the Asus. Drivers install, all seems fine, then just randomly shuts off (lights on keyboard etc stay on for a moment then all lights go out invluding power). Power button turns it back on.

I've attached hwmonitor and gpu-z stats

[retrorepair2]

Re: Asus GL703GM short

Can only post two at a time it seems.

Still can't find any shorts 😕

[retrorepair2]

Re: Asus GL703GM short

Actually, the CPU package and IA cores do seem to be drawing excessive current considering it's not really doing anything

[mon2]

Re: Asus GL703GM short

Can you power up and boot ok using Windows safe mode?

Does the logic board remain on in safe mode till you turn it off ?

[retrorepair2]

Re: Asus GL703GM short

I can try but I doubt it, sometimes it turns off loading windows, other times it will stay on for 15 to 20 mins, there doesn't seem to be much of a pattern to it.

[retrorepair2]

Re: Asus GL703GM short

I am booting in safe mode now. It did just turn off starting windows butbI noticed the charging light flash before it turned off. Could be a coincidence but maybe it is in fact related to the charger IC? I can't see any shorts on it though..

[mon2]

Re: Asus GL703GM short

ACDRV at the 4k resistor 20v on the mosfet side, 2.7v on the IC side?

The ACDRV is too low to enable the DCin mosfets with the power adapter.

Locate the 4k resistor and remove it. Do not lose this part.

Power up again and check the ACDRV voltage at the charger IC pin.

Is it now ~25 volts ? That is the proper voltage to enable the N-channel DCin mosfets.

ACDRV (should be) = adapter voltage (19v) + REGN (6v) = ~25 volts to enable.

[retrorepair2]

Re: Asus GL703GM short

The ACDRV is too low to enable the DCin mosfets with the power adapter.

Locate the 4k resistor and remove it. Do not lose this part.

Power up again and check the ACDRV voltage at the charger IC pin.

Is it now ~25 volts ? That is the proper voltage to enable the N-channel DCin mosfets.

ACDRV (should be) = adapter voltage (19v) + REGN (6v) = ~25 volts to enable.

I'll try that later. Are we thinking a failed resistor or just eliminating the rest of the circuit to prove the IC is creating the correct voltage? Just to check, if the battery is failed, would this behaviour be correct? I have no idea if it actually works and don't know how I'd find out, though hwmonitor did say its was at 100% wear. Not sure if this is just because of the IC or if that's actually data from the battery itself.

In other news, I know nothing as the laptop has been sat quite happily in safe mode for almost an hour now. Far and away the longest it's stayed on for.

[mon2]

Re: Asus GL703GM short

No not a failed resistor but a failed DCin mosfet can cause the ACDRV voltage to be lower than it should be.

This is from the battery charger sticky article above by @Piernov.

The 2 x DCin mosfets are the usual suspects. Specifically the 2nd DCin mosfet.

By removing the series ~4k resistor, we will know if the charger IC is attempting to supply the boosted voltage or not.

[retrorepair2]

Re: Asus GL703GM short

No not a failed resistor but a failed DCin mosfet can cause the ACDRV voltage to be lower than it should be.

This is from the battery charger sticky article above by @Piernov.

The 2 x DCin mosfets are the usual suspects. Specifically the 2nd DCin mosfet.

By removing the series ~4k resistor, we will know if the charger IC is attempting to supply the boosted voltage or not.

Ah I see. I suppose there is a possibility of that since the second DCIN mosfet had a short on it's source when I first started this, that's what led me to the shorted mosfet on the gpu power rail.

It does seem like the exact REGN voltage is missing though doesn't it, even though it exists on the REGN pin?

Again though, would this be ~25v if the battery was junk?