WinUser
Member
Last Activity: 04-05-2025, 01:34 AM
Joined: 09-14-2019
Location: Germany
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wow, thank you
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Lenovo PN: 5B21C33413
Motherboard Model code: NM-D691...Leave a comment:
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Lenovo Yoga Slim 7 pro 14ach5 O 82N5 (OLED Model)
Hello there, have anyone a schematic or a boardview for this laptop? it has a non touch 2.8k 14" OLED - this is broken and i want to drive it with a standard 2.2k IPS panel type, but the 40pin edp connector have not a default pinout -.- (voltages are fine (LCD driver 3.3V and BL voltage 16-19V) but the other datalines...i dont know what line is what -
Re: Sapphire R9 390 Nitro Blackscreen...why?
hmm...Are there known cases where it really is? i mean - i can reballing the GPU with leaded solder balls. I must only buy a stencil for Hawaii GPUs (i only have for GM204/GM200 and GK104)
but how often does it happen that this GPUs becomes broken solderballs?Leave a comment:
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Re: Sapphire R9 390 Nitro Blackscreen...why?
Jea...i think its a dead gpu. i have test many things...underclock it to 600Mhz, more/less vcore, underclock memory,...nothing works
this blackscreen error also apears on many other R9 290/390 graphic cards...its crazy. Nothing helpsLeave a comment:
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Sapphire R9 390 Nitro Blackscreen...why?
Hello there, is there any known faulty component on a R9-390 Nitro that cause the blackscreens?
About the Nitro R9-390 /390x cards from sapphire, you can read many threads in internet, all the sam error: Blackscreen on 2D or light load. But no one hav a realy working solution about this issue.
I have replaces each electrolyt capacitor - but error is still here...after loading drivers -> blackscreen. Without installed drivers, all is fine
have here in this forum anyone a working solution about this error? -
Re: Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
GOT IT
notebook repaired...
N Channel Dual Mosfet MTDN7002ZHS6R (Location PQ23) was broken...its a "inverter" for DD_ON# and SUSB...but on SUSB the Drain stays high although the gate was also high...
swapet with a other one in stock - a 2N7002KDW - and now it boot up like a charm
The broken MTDN7002ZHS6R was "half broken" - never seen...when gate high, the 3.3V over 10k on Drain was only droped down to round 2.7V...not enough.
So, notebook...Leave a comment:
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Re: Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
ok, here the measurements:
RSMRST# 3.25V directly on ITE SuperIO
SUSC# 3.25V directly on ITE SuperIO
SUSB# 3.25V directly on ITE SuperIO
ALL_SYS_PWRGD 0V directly on ITE SuperIO
SYS_PWROK 0V
PWR_SW 3.25V directly on ITE SuperIO
1.05V_LAN_PWRGD 3.3V
DDR1.5V_PWRGD 3.3V
1.05VM_PWRGD 3.3V
PM_MPWROK 3.3V
V1.05M_POERGO_AND 3.3V
PCH1.5VS_PWRGD 0V
DELAY_PWRGD 0V
PM_PCH_PWROK 0.9V
PCH_PWROK 0V
G5310 (1.5VS,...Leave a comment:
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Re: Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
hello piernov, thanks for help
question: can i measure the voltage diretly on ITE SuperIO? when i look at the schematics, some voltage will go in, and some go out...but when a voltage is "generate" by PCH - how can i measure it? its a BGA chip. Test points not shown in schematics...
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Re: Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
ServiceManual here
I do not know how the startup process works, what elements becomes a poweron signal...what to measure now...the other repaired notebooks hase only simple errors like capacitor short, or blown mosfet, but this notebook here is a harder case....Leave a comment:
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Re: Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
*edit* i figured out that the 3.3V Powerrail is always on, and the 5V rail goes on (also on USB, but not on ODD/HDD) when powering on the notebook.
1.3V also present on RAM, but ram dont get warm (also testet with another ram)Last edited by WinUser; 09-14-2019, 03:35 PM.Leave a comment:
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Clevo W670SJ /W650SJ - PowerOn light is on but nothing works
Hello all and greetings from germany,
I have a strange notebook here, a clevo W670SJQ1, motherboard is a W650SJ. Problem is: When press the PowerButton, the PowerOn light goes green (on) but nothing happens - no Fan spinning, no HardDisk Spinning. Notebook stay in this status until i press the PowerButton again for ~4 sec to power down.
Battery Charging works fine (LED goes orange, when its full it goes to green).
I have many experience in notebook and graphic-card repairs (many years)
but the thing here is a mystery to me. I have many equipment like...
Last edited by WinUser; 09-14-2019, 11:33 AM. -
Re: New Members - please post your introductions here
Hello, iam the new one greetings from Germany ;-)
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