Yoga S730-13IML Laptop - Type 81U4 ~ Beep Codes?

[Rigo]

Water spilt in the laptop bag affecting it ~ water ottle and laptop in the bag
I dis-assembled and dried it up on a heatpad.
After a number of restarts at boot, it emits one single loud beep and finally gets to the login screen.
The screen seems to have been affected as it is extremely faint and I can only make up what is there.
But it displays perfectly to an external monitor.
After logging everything works perfectly.
The loudness of the beep is not normal and usually laptops do not beep at boot like desktops.
I just could not find a chart with beep codes for that machine ~ they seem to have replaced that with an app for Android with very mixed reviews, mostly rated as useless.
I'm suspecting there might be a video card problem for the faint in-built display rather than the LED panel having actually been affected. The video card issue might be the source of the loud beep?
I'd hate to get another LED and it turns out to be a graphics card/motherboard issue

 

[seashore]

First thing to try would be a new screen.
I'd suggest you keep a few different types of spare screen in your kit - used ones are fine for testing.

 

[Markverhyden]

I'd unplug the screen and see what happens. That being said I'd actually put my money on it being a some board issue. There's far more exposed stuff there compared to a screen.

 

[Rigo]

First thing to try would be a new screen.
I'd suggesr you keep a few different types of spare screen in your kit - used ones are fine for testing.

Didn't actually think about testing with another old screen.
I do have some spares around though not the right type as this one is the glued on kind but the connector should be right for testing, probably a 30-pin one.
This is a 14" and as I said glued on. From the hardware maintenance manual it looks reasonably feasible.
Thx for the suggestion.

 

[Rigo]

I'd unplug the screen and see what happens. That being said I'd actually put my money on it being a some board issue. There's far more exposed stuff there compared to a screen.

Not sure what unplugging the screen would reveal.
It might still loudly beep, and as the external display works pretty good what should I be looking for?

 

[NviGate Systems]

It's not just drying it, you need to do a distilled water bath to draw out any corrosion and metals, then a bath with IPA to displace all the water. Ideally, ultrasonic bath would be best. If traces were corroded, it may work for a while but problems might happen down the road. Even regular water has mineral and metal content, which need to be flushed out.

If the LCD is dim, the backlight/LED circuit is probably shorted.

 

[Markverhyden]

Not sure what unplugging the screen would reveal.
It might still loudly beep, and as the external display works pretty good what should I be looking for?

On the theory that the beep code is a POST event that may indicate a problem with the display.

 

[Rigo]

It's not just drying it, you need to do a distilled water bath to draw out any corrosion and metals, then a bath with IPA to displace all the water. Ideally, ultrasonic bath would be best. If traces were corroded, it may work for a while but problems might happen down the road. Even regular water has mineral and metal content, which need to be flushed out.

If the LCD is dim, the backlight/LED circuit is probably shorted.

I do have the gear to do the ultrasonic cleaning as you suggested but only used it for coffee and juice affected systems. I would clean them up with normal water, then spray rinse with demineralised water, blow dry then follow with ultrasonic cleaning with PCB cleaning solution, blow dry that before the IPA bath and final blow dry again.
Dry up on a heating mat at 60 deg. C for 3 hours each side.
Didn't think about corrosion from straight water which indeed is quite possible.
Thanks for that.
I'll test with another spare screen to hopefully confirm it's the backlight which I suspected too but due to probably a brain drain didn't think about a test to clear the confusion.

 

[Rigo]

On the theory that the beep code is a POST event that may indicate a problem with the display.

I'm suspecting that to be the case too, but not detecting the screen would still lead to the same error I'd say?
I'll check my stock of spares maybe one would be compatible enough for testing

 

[Rigo]

I did get to test with another screen which confirmed the in-build LED was indeed faulty.
The loud beep was a BIOS reset warning rather than related to the screen problem.
Now a replacement panel is not cheap for this model. Not sure whether my customer will agree to the repair adding the charge for the wet accident restoration.

 

[frase]

Sooo how much you going to charge on this...advise client of current diagnosis. Set a charge point and wait for them to explode.\oo/

In these environments I advise client of worse case scenario. I will attempt to recover data then work on resolving the issue of keeping the system alive. You have not explained how you approached this with the customer initially - can you elaborate was it data retrieval or system hammer the defib STAT? Cheers.

 

[Rigo]

Well, I had given here the cost for attempting restoration from the water accident with caveat that as she had tried to restart the laptop, something could have fried (she kept it in the fridge overnight as apparently thing dry up in the fridge ). That price did not include replacement part and labour if something did need replacing.
She elected to give it a try and then decide from there.
I also gave her the option of an insurance claim report (not free) if the final repair cost was going to not be justifiable due to high cost of parts vs a new machine from a pay-out.

 

[frase]

hmmm...which level of fridge mine is level 48.

seriously though level is it in the crisper?

comon you cant be serious.. so how much did you actually quote..,need to know as my fridge is asking.