Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

[Acnologia]

Hello to all,

Today i had a computer from a friend of mine to change thermal paste etc. to clean the inside of the laptop,it's an operation that i have long done so many times in so many laptops but today my luck was , hiding in another place.

The laptop was working great, all good .
I changed the thermal paste,cleaned the vents all great (Thermal Paste: Arctic Silver 5) .
Turned on the laptop logged in the Windows, backup everything ,and then restarted the computer logged into BIOS settings to change the BIOS from UEFI to Legacy and the Secure BOOT -> Disabled,all that for the laptop to understand that i have a "USB Stick" ready to go for the Windows 10, restarted again logged in the computer, all was good .

I restarted then , and from then the laptop turns on but doesn't show anything!

Stuff that i have already made.
1. Cleared CMOS
2. Changed Battery in case of drop Volt
3. Checked 4 different kind of RAM
4. Changed the charger
5. Double - Triple check all the cables
6. Remove everything and try to turn on the laptop without anything on it just a barebone of motherboard with only CPU + RAM + power button + DC port connected nothing else.
7. The CPU is heating UP a lot , not any other part of the laptop not vrams not capacitors all clear and cold ,the CPU i measured it that it heats up ,up to 60 celsius inside 30 sec.without posting anything (changed again thermal paste to be sure)

Again nothing.
Can all this result that the CPU is DEAD,or something else has been blown ?


Now,before the last restart as i was typing into the computer and until restart, i moved the USB from 3.0 to 2.0 , to check if everything Okay ,that's the last thing that i did before restarting the computer...

I tried to explain everything.

[nixi22]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Sound like corrupted bios, try flash it.

[dskall]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

I would check around cpu pins, caps etc. with magnifying glass for damage shorted pins. Getting good contact with heatsink?

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Sound like corrupted bios, try flash it.

Can you believe that i have , searched the ENTIRE motherboard and can't find the BIOS Chip ?

I would check around cpu pins, caps etc. with magnifying glass for damage shorted pins. Getting good contact with heatsink?

Yes,already done that double-triple check with magnifying machine not just glass.

[String2016]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

post a clear image both sides of the motherboard

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

post a clear image both sides of the motherboard

Here are all the pics that i took,sorry but i don't have a DSLR or something.

https://s29.postimg.org/xeuwmeyav/image.jpg
https://s29.postimg.org/f4e6yorhj/image.jpg
https://s29.postimg.org/rryjoxvs7/image.jpg
https://s29.postimg.org/4gafzuhif/image.jpg
https://s29.postimg.org/tl1gd9gyv/image.jpg
https://s29.postimg.org/pfqjrcj6v/image.jpg
https://s29.postimg.org/960dog8iv/image.jpg


And to catch you up the only chip that i can find that is inside the schematic database etc. is the one that says ""cFeon Q64-104HIP Q24L04A 1231LDA""

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Here is my dumb file that i have read from my programmer.

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Does anyone have the file , or can help out fixing this one ?

[jiroy]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

I Have this feeling the CPU is fried , although sometimes thermal protection sensors onboard would prevent it from starting .
I bet this Sony was suffering heating problems and random restarting , or instant shut downs . Maybe that's why you were changing paste and pads .

One interesting symptom in dying processors i've always noticed , is , when and if the system start again , prior to its total failure , the system wouldn't notice what's happening , meaning , he won't go in safe mode or any windows similar warnings and precautions . The system will just boot on normally as if nothing happened ...

I hope i'm wrong , but only last week , i changed a Core2 Duo cpu on a Sony vaio .

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

I Have this feeling the CPU is fried , although sometimes thermal protection sensors onboard would prevent it from starting .
I bet this Sony was suffering heating problems and random restarting , or instant shut downs . Maybe that's why you were changing paste and pads .

One interesting symptom in dying processors i've always noticed , is , when and if the system start again , prior to its total failure , the system wouldn't notice what's happening , meaning , he won't go in safe mode or any windows similar warnings and precautions . The system will just boot on normally as if nothing happened ...

I hope i'm wrong , but only last week , i changed a Core2 Duo cpu on a Sony vaio .

No it wasn't suffering.But one time per year i clean and install new thermal paste.I want my systems to be in Great shape.

I am just going to buy a new CPU ,to check it up but 1st i want to be sure about the BIOS

[jiroy]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

No it wasn't suffering.But one time per year i clean and install new thermal paste.I want my systems to be in Great shape.

I am just going to buy a new CPU ,to check it up but 1st i want to be sure about the BIOS

Maybe one of the Bios Gurus around will help you then . Vaio ones were always a rarity . Doing searches about your model number shows almost nothing on the net .
Good luck .

[age80]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Your Motherboard is this da0hk5mb6f0

so go there--->>>
https://www.badcaps.net/forum/showthread.php?t=41215

[caspian]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Does the fan spin at maximum speed with CPU plugged in?
Does the PCH get warm? or it is completely cold?
Does it show any blink/beep code if you turn the laptop on without CPU?

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Maybe one of the Bios Gurus around will help you then . Vaio ones were always a rarity . Doing searches about your model number shows almost nothing on the net .
Good luck .

Your Motherboard is this da0hk5mb6f0

so go there--->>>
https://www.badcaps.net/forum/showthread.php?t=41215

Does the fan spin at maximum speed with CPU plugged in?
Does the PCH get warm? or it is completely cold?
Does it show any blink/beep code if you turn the laptop on without CPU?

Thank you all for the information and the answers but i fixed it with the most strange way ever.

I installed the latest BIOS , update via programmer , and with a little bit mod on the BIOS itself and tried to turn it on ,nothing was shown...

Then i re-installed the DUMB that i had read from the laptop when i was trying to check about the BIOS ,and...

The laptop works.I just re-flashed the BIOS (Dumb) from it's self.

Strange.....

[dskall]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

And now cpu does not get hot?

[jiroy]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

Thank you all for the information and the answers but i fixed it with the most strange way ever.

I installed the latest BIOS , update via programmer , and with a little bit mod on the BIOS itself and tried to turn it on ,nothing was shown...

Then i re-installed the DUMB that i had read from the laptop when i was trying to check about the BIOS ,and...

The laptop works.I just re-flashed the BIOS (Dumb) from it's self.

Strange.....

It's kinda not strange . When a CPU is prevented from starting by the Bios thermal sensors system , you'll have to convince that Bios that something has changed ... Resetting Bios , new programming , etc , etc .. could do the trick . Glad your troubles is over anyway ..

[caspian]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

glad it worked.
what was the fan's behavior before and after the bios programming?

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

And now cpu does not get hot?

No , in stress after 2 hours it is stuck on the 75~78 , doesn't hit 80.

It's kinda not strange . When a CPU is prevented from starting by the Bios thermal sensors system , you'll have to convince that Bios that something has changed ... Resetting Bios , new programming , etc , etc .. could do the trick . Glad your troubles is over anyway ..

Yes, but it was done already one time,that's the strange thing. Now that i got back the original dumb everything was just fine.

glad it worked.
what was the fan's behavior before and after the bios programming?

The same .

[Th3_uN1Qu3]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

I have read about things like that happening often with TVs. Many times just dumping the flash memory and rewriting the same contents will make it start.

My guess is that the flash itself is being damaged and getting unstable, and a rewrite refreshes the cells so to speak.

Keep the dump saved, if it happens again, program a new BIOS chip and solder it in. I've replaced quite a few flaky ones in the past 2 years.

[Acnologia]

Re: Sony VAIO SVF1512C6EW Rev.F suddenly doesn't show anything ?

I have read about things like that happening often with TVs. Many times just dumping the flash memory and rewriting the same contents will make it start.

My guess is that the flash itself is being damaged and getting unstable, and a rewrite refreshes the cells so to speak.

Keep the dump saved, if it happens again, program a new BIOS chip and solder it in. I've replaced quite a few flaky ones in the past 2 years.

me too ,but never had something like that.Most of the times i was reading , what is was needed to be fixed in a dumb,and then flashing into a new chip could make it work. But this occured for the first time..

In the end ?

For everything exists the "1st time"...