Hello
Just to give news :
Yes I have replaced the mosfet
Yes the CPU was shorted
I have bought a new mainboard, non-shorted CPU report 2.4 ohms on same VCC line.
worlor
Member
Last Activity: 10-23-2022, 08:11 AM
Joined: 10-28-2020
Location: Le Mans
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
Hello
Just to give news :
Yes I have replaced the mosfet
Yes the CPU was shorted
I have bought a new mainboard, non-shorted CPU report 2.4 ohms on same VCC line. -
Re: MSI GE62 Laptop Motherboard with Short on main power rail
Hello,
No I have the new mosfet but I didn't took the time to solder it :/
mcplslg123 killed my hope of saving it...
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
But I have measured 0.4ohm between GND and +VCC_Core. Do you think it's good ? Or CPU is shorted ?Leave a comment:
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
Hello
After removal of chokes, I have found the PQ20 MOSFET was shorted.
I have removed it, and I have now 3kOhms between pwr_src (19V) and gnd.
I will replace it and see what happens when I put DC IN...Last edited by worlor; 07-02-2021, 04:53 AM.Leave a comment:
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
OK I have injected current on main rail. 1.1V but with 3A because supply can't do more.
I have searched for hot zone on the mainboard.
I have found one place that became very hot near +VCCSA mosfet PQ24.
The mosfets from +VCC_Core were hot too.
I think to desold choke and capacitor on these rails to see if the short gone.
Am I right ?
Any better idea ?...Leave a comment:
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
OK, thank you, gonna desold and try with a power supply...Leave a comment:
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Re: MSI GE62 Laptop Motherboard with Short on main power rail
Hello, thanks for help
I am not sure about the CLR you talking about. Is it PR17 ? 0.005Ohm resistor
See image attached...Leave a comment:
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MSI GE62 Laptop Motherboard with Short on main power rail
Hello,
I am currently learning to repair laptop motherboard and I need some advice/help.
I have a MSI GE62-6PQ laptop that didn't boot. It's an old laptop that got a glass of coke :/
I have cleaned the motherboard with isopropyl alcohol and a brushteeth.
The motherboard is a MS-16J51. I put the schematics attached.
I also attach high res pictures of the board.
Symptoms :
When I connect it to the power supply, it goes into protection.
What I have done :
Checked the fuse : OK
Visual check OK : No burned components
...Last edited by worlor; 06-30-2021, 03:59 PM. -
Re: THOMSON / TCL 43UC6406 jumping image
Hello,
Tried to tape pin 3-4 of the ribbon cable, green lines have appeared but the "wobbling" is still present :/Leave a comment:
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Re: THOMSON / TCL 43UC6406 jumping image
I have tried with the other one and black screen too :/Leave a comment:
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Re: THOMSON / TCL 43UC6406 jumping image
On post #3 there was a boot logo when I boot up the TV with the 2 ribbon cable. Now the screen is completely black. I don't know why.
The boot up process work because the leds lights up then down...Leave a comment:
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Re: THOMSON / TCL 43UC6406 jumping image
I cleaned everything and the ribbons cable are OK.
When I connect only right side of the screen, I got a half-screen white and the other black, on the white side there is black line and the "jumping" effect is present on the right side. When I connect only the left side of the screen, just a half white screen. I have tried swaping the two ribbon cable -> same result.
No changes when I move gently the board when screen on.
Also, the t-con get very hot....Last edited by worlor; 01-20-2021, 12:17 PM.Leave a comment:
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Re: THOMSON / TCL 43UC6406 jumping image
No visible issue ......
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Re: THOMSON / TCL 43UC6406 jumping image
...
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Re: THOMSON / TCL 43UC6406 jumping image
No I haven't clear half screen. See attached pictures....Leave a comment:
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THOMSON / TCL 43UC6406 jumping image
Hello everyone
I got a Thomson (TCL rebrand) 43UC6406 television with a jumping image problem.
I have replaced the t-con board, but the problem continues ...
I have make a video :[url]https://youtu.be/v1Y_QfifP-E[/url]
The motherboard nor his components are damaged
I don't know what search next ? Can it be the LCD ? How can I check this ?
Thanks for helping me save this !https://Hello everyone<br /> I got ...e t-con board,... -
Re: Bad Vestel 17IPS20 : shortage, need help
I have the schematics, I have posted it on first post. But the schematics haven't the same values than on board :/...Leave a comment:
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Re: Bad Vestel 17IPS20 : shortage, need help
Hello,
Some bad news today
I have replaced Q216, Q211, R320 and I tried to measure voltage on VDD on U202 but I have short-circuited with pin 7 and it burnt 3 resistance and 1 diode.
I can replace these but how can I know what impedence should i use ? I can't see the number on the burnt resistance (see picture)
Any ideas ?...Leave a comment:
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Re: Bad Vestel 17IPS20 : shortage, need help
No, R320 is damaged but it's not open. I measured 82kohm on it : it's far from 0.47ohm
I will replace...Leave a comment:
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Re: Bad Vestel 17IPS20 : shortage, need help
For R311, i measured 48 Mohm, I think it's dead too.
But I can't see the value on it :/
It seems it's a 470 ohm, do you think it's correct ?...Leave a comment:
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