HP Notebook 15-dy1731ms VERY SLOW

[nissimezra]

Hi to everyone.

I never seen something like this. I have HP Notebook 15-dy1731ms motherboard: DA0P5DMB8CO REV C that is very very slow. I tried all the basic, updating the bios, replacing ssd, replacing ram, soldering all coils, reflow CPU power supply but the laptop is still very very slow. Never seen a motherboard that is slow. CPU power suppliers 1.8 volts, the cpu barely getting hot.

What left for me to do is reflow the CPU and try manually programing the bios chip with programer.

Anyone have any idea what it can be?

[mon2]

Re: HP Notebook 15-dy1731ms VERY SLOW

Very slow is often ME faults of the bios. Do not reflow till you receive other advice.

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

Very slow is often ME faults of the bios. Do not reflow till you receive other advice.

Thank you for your answer. It belong to a customer I can't keep it long

So it worth trying to manually program the bios chip?

[reformatt]

Re: HP Notebook 15-dy1731ms VERY SLOW

CPU throttling is actually quite common.

It can be many things. Throttling can be asserted by the system firmware, or by the CPU itself if it exceeds its thermal limit. You can use an app called Throttlestop to see what it is being asserted, and to override it. Check speed in Windows task manager performance tab.

Recently had a laptop which was throttled which had a bad battery. It registered at 100% charged via SMBUS, however had no voltage. System was throttled to it's slowest speed by the BQ chip asserting PROCHOT. When battery was removed and run on adaptor only, CPU speed returned to normal. Replacing the battery resolved it.

You can also get throttling when using non-genuine or underrated adaptors, especially on Dell systems. HP's are rather fussy with adaptors. For Intel CPU's, you can use the Intel Extreme Tuning Utility to see if throttling is being applied.

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

CPU throttling is actually quite common.

It can be many things. Throttling can be asserted by the system firmware, or by the CPU itself if it exceeds its thermal limit. You can use an app called Throttlestop to see what it is being asserted, and to override it. Check speed in Windows task manager performance tab.

Recently had a laptop which was throttled which had a bad battery. It registered at 100% charged via SMBUS, however had no voltage. System was throttled to it's slowest speed by the BQ chip asserting PROCHOT. When battery was removed and run on adaptor only, CPU speed returned to normal. Replacing the battery resolved it.

You can also get throttling when using non-genuine or underrated adaptors, especially on Dell systems. HP's are rather fussy with adaptors. For Intel CPU's, you can use the Intel Extreme Tuning Utility to see if throttling is being applied.

Thx for the advices
I'm aware of dell and HP 3rd pin. I did try different power adapter and without battery, still the same. I'll check the therotelling issue

many thx

[mon2]

Re: HP Notebook 15-dy1731ms VERY SLOW

as per advice by @reformatt, remove all power.

Meter in resistance mode. Measure the resistance to ground of each pin on the battery connector (without the battery attached). This is to confirm if the SMBUS SCL / SDA lines are shorted from an ESD event which will cause the communication to fail across the battery and other possible interconnects.

Post the measurements.

While you are reviewing the board, hunt for the charger IC which should be nearby. Being an HP model, likely that it will be the 'BQ' marked device from TI.

Post the topside markings for a review.

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

CPU throttling is actually quite common.

It can be many things. Throttling can be asserted by the system firmware, or by the CPU itself if it exceeds its thermal limit. You can use an app called Throttlestop to see what it is being asserted, and to override it. Check speed in Windows task manager performance tab.

Recently had a laptop which was throttled which had a bad battery. It registered at 100% charged via SMBUS, however had no voltage. System was throttled to it's slowest speed by the BQ chip asserting PROCHOT. When battery was removed and run on adaptor only, CPU speed returned to normal. Replacing the battery resolved it.

You can also get throttling when using non-genuine or underrated adaptors, especially on Dell systems. HP's are rather fussy with adaptors. For Intel CPU's, you can use the Intel Extreme Tuning Utility to see if throttling is being applied.

You are right, cpu running max 16%

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

as per advice by @reformatt, remove all power.

Meter in resistance mode. Measure the resistance to ground of each pin on the battery connector (without the battery attached). This is to confirm if the SMBUS SCL / SDA lines are shorted from an ESD event which will cause the communication to fail across the battery and other possible interconnects.

Post the measurements.

While you are reviewing the board, hunt for the charger IC which should be nearby. Being an HP model, likely that it will be the 'BQ' marked device from TI.

Post the topside markings for a review.

Thx for the detailed answer
The cpu running max 16%
first 2 ground
3rd 206k
4 12.6k
5 0.375m
5 and 6 1.4 mega

[mon2]

Re: HP Notebook 15-dy1731ms VERY SLOW

The lines do not look to be shorted.

See attached. Carefully measure the voltage to ground of each pin.

Post each measurement and the pin number.

Just confirming that the power adapter is deemed to be ok.

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

The lines do not look to be shorted.

See attached. Carefully measure the voltage to ground of each pin.

Post each measurement and the pin number.

Just confirming that the power adapter is deemed to be ok.

The risk is to high for me to check each pin, I have shaky hands, I will most likely short something

Many thanks for your help

[Stevedb]

Re: HP Notebook 15-dy1731ms VERY SLOW

Try to measure nearby components capacitor / resistors and etc. and tape needles to your probe or use needle probes.

[nissimezra]

Re: HP Notebook 15-dy1731ms VERY SLOW

Try to measure nearby components capacitor / resistors and etc. and tape needles to your probe or use needle probes.

It's not mine, I don't want to risk returning dead laptop to the customer . I told him the risk but still.