ASUS TUF Dash Motherboard FX516 REV 6.0 Model Device Not Charging

[lazenes]

Locate and measure the voltage to ground on each leg of SL3006.

I couldn't find SL3006 on my rev 6.0 board — that part isn't present on this revision. In the same area there is a resistor labeled R3220, and I measured ~3.3 V to ground on it.

Can R3220 be the equivalent/component replacing SL3006 on rev 6.0? If so, which points should I measure next (both sides of R3220, MB_MAX_POWER, or other specific pins)? I can attach a photo of the board area if that helps.

[mon2]

No, I don't think this part is the same. To confirm, meter in diode mode. Touch your meter probes together and the meter should tone beep.

Remove all power to the board. One meter probe on the other side of this mystery part. Other probe on the other side of this same part. Do you hear a tone beep? If yes, then this is a low resistance component - like the ferrite bead in the schematics we are referencing from v4.0.

[lazenes]

No, I don't think this part is the same. To confirm, meter in diode mode. Touch your meter probes together and the meter should tone beep.

Remove all power to the board. One meter probe on the other side of this mystery part. Other probe on the other side of this same part. Do you hear a tone beep? If yes, then this is a low resistance component - like the ferrite bead in the schematics we are referencing from v4.0.

I tested the mystery component in diode mode and got the following readings (board fully powered off):

Diode mode: probe orientation A→B = 0.642 (beep/reading), B→A = 1.470 (reading)

Resistance mode: ~10 kΩ

[mon2]

Go back to the resistor @ R8935. Attach the pre-charged battery. Now measure the voltage to ground of R8935. Do you have a voltage now with the battery attached?

[lazenes]

Go back to the resistor @ R8935. Attach the pre-charged battery. Now measure the voltage to ground of R8935. Do you have a voltage now with the battery attached?

Unfortunately, there is no voltage coming through. :/

[mon2]

So there is an issue here for sure.

Can you confirm that when you attach the battery, do you press the power switch to turn on the board? This is important.

From the mix of reviewed schematics - the very first power rail that must be a logic '1' = 3v3 is +3VA_EC.

The +3VA_EC turns into +3VACC and this +3VACC should appear onto the resistor used for the adapter detection but is missing. This is all assuming that your board will be similar to the reviewed schematics to date. Most likely will be similar.

[mon2]

Do you have PU8803 onboard?

PS: Have to run out. BBL.

[lazenes]

I accidentally caused smoke to come out of the card earlier, and now the card won't open.

[lazenes]

I repaired the burnt part. The device turned on. I read a value of 3.3 on one side and 1.2v on the other, but it is not charging.

[mon2]

Which part was replaced? Where are you measuring the 1v2?

[lazenes]

Do you have PU8803 onboard?

PS: Have to run out. BBL.

THERE IS NO PROBLEM HERE, but the battery charge light is still not on, or it won't turn on without a battery. motherboard

[lazenes]

Which part was replaced? Where are you measuring the 1v2?

The power button flex cable burned out, so I replaced it. The device turned on; there is no problem with the motherboard.

[mon2]

Ok back from taming my out of control lawn.

Do you have +3VA_EC voltage at the output pin # 11 of the above load switch?

[lazenes]

Ok back from taming my out of control lawn.

Do you have +3VA_EC voltage at the output pin # 11 of the above load switch?

yes+

[mon2]

Good.

Do you have a voltage to ground @ AD_MAX_POWER? This is different than MB_MAX_POWER.

[lazenes]

Good.

Do you have a voltage to ground @ AD_MAX_POWER? This is different than MB_MAX_POWER.

With both the battery and charger connected, there is no voltage to ground at AD_MAX_POWER when the board is off. However, when I power on the device, I measure about 1.28 V.

[mon2]

My bad - the AD_MAX_POWER is the adapter power signal; the MB_MAX_POWER appears to be the motherboard max power signal.

What are the markings on your power adapter? Is it a 180W rated power supply?

[lazenes]

My bad - the AD_MAX_POWER is the adapter power signal; the MB_MAX_POWER appears to be the motherboard max power signal.

What are the markings on your power adapter? Is it a 180W rated power supply?

Yes, exactly.

[lazenes]

The adapter's image is this

[mon2]

So the adapter IS being announced correctly to the EC.

Confirm again if you have a voltage for MB_MAX_POWER. According to the v4.0 schematic, the high side resistor should also be @ ~3v since it is tied to +3VACC.

If no voltage, remove all power. Meter in resistance mode. Measure the resistance between the top side of PR8935 to top side of PR8937. Best to test each side of these parts to confirm if one combination is ~0 ohms. That is, each high side resistor should be mated to be +3VACC. From earlier checking, the MB_MAX_POWER was @ 0v.