Hie techs, I have a Hisense 55u7wf which is not powering on. Changed the power supply board but still nothing.
The power board has no stby voltage
It has 8v instead of 12v, 13v instead of 18v.
Somebody help me or may I have schematic diagram of the TV
Main board - RSAG7.820.9580/ROH
Power supply board RSAG7.820.8717/ROH
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by JasonC89So I have an Macbook Pro that came in for no power (I dont do a lot og Macbook repairs). After some testing I found it was only getting 5V with very little current draw, if any.
I searched around for shorts, and didnt find any. No real signs of liquid damage etc.
Following a couple of questions from other members here I was able to further test voltages etc. Im now at a point where PP3V3_G3H is showing, but only at 2.23V.
I have 5v on the Enable pin.
Also the dual diode D6902 is showing :
5.19V @ Pin 1
0v @ Pin 2
4.15V @ Pin 3
L6900...Today, 07:03 AM -
by baglaivladHi. Please share your knowledge, which programmer can be used to flash firmware for MX25S6473F (SPI ROM, 4x4mm 8-XSON)? This IC can be found in MacBook Air M2 (A2681), U1900. Power and data are 1V25.
[URL]https://www.mxic.com.tw/en-us/products/NOR-Flash/Serial-NOR-Flash/Pages/spec.aspx?p=MX25S6473F&m=Serial%20NOR%20Flash&n=PM2860[/URL]https://Hi. Please share your knowle...ww.mxic.com.twYesterday, 11:42 AM -
by Dr.dI have a lenovo ideapad 5 14itl05, board LA-K321P, That will only power up on Battery only, or with battery disconnected and power adapter only. If battery is connected and usb-c power plug connected. It only works on battery and will not charge. I can however force it to charge by connecting the battery from a disconnected state while the power USB c plug is powering the laptop.
Additionally....to add to this strange situation. The usb-c power plug ONLY works to power the laptop on one side when inserted into the boards power usb c plug. If you rotate it 180 degrees, the board gets...04-05-2024, 11:48 AM -
by artesdevHi all.
Need the MS-17P1 Board view for an MSI GS77
Thanks in advance...-
Channel: Schematic Requests ONLY!
Today, 02:35 PM -
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by questoreHi Everyone,
I have brought to you a strange problem display maybe you have some ideas how it can be fixed or what could cause such a problem.
Display Type: B173ZAN01.1
MANUFACTURER: AU Optrinics
H/W:0A F/W:1
Changed the cable and tried to bend, push the back f the screen and both problem persists, nothing changes.
There is no any sign that the back of the screen was under pressure, or has moving cables.
PROBLEM 1:. Red spots / area in the screen
MORE INFO: If i gently press above the problematic area then it disappears until...-
Channel: Troubleshooting Computer Displays
Today, 12:22 PM -
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by alltalkHi
Have one of these cheap laptops bios liocked - asks for password on boot.
Could someone remove the lock for me please?
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Channel: BIOS Requests ONLY!
Today, 08:09 AM -
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by angelosHi Guys, i just have a question that is probably easy to answer if you have experience on such matters.
My Dell Monitors screen was damaged by lightning via the HDMI port. The monitor does come on but cannot display HDMI or VGA image. it says no signal.
I have ordered the board on Aliexpress. They say 100% working. Don't trust. it.
My question is, after installing the new board, is there anything else I need to do in order to make this board work. I know on some TV's you need to load software on the board to make it work but this is a monitor or even having to go into service...-
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03-25-2024, 04:12 AM -
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by RunlincHi all, I need to change the backlights in a Hisense 55E76GQTUK. The screen is glued to the chassis, what is the easiest way of delaminating the screen from the chassis please?
also what double sided tape would you recommend to glue it back in? ….. or is that a question to ask once the screen is out in one piece?
Many thanks for any ideas you have.Yesterday, 10:02 AM -
by ductranvinhBrand: MSI
Code:MS-7A63 Rev 1.0
Product Identify: Z270 Gaming Pro Carbon
I have schemaltic,but i need board view!...-
Channel: BIOS & Schematic Requests!
Today, 10:59 AM -
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by JasonC89So I have an Macbook Pro that came in for no power (I dont do a lot og Macbook repairs). After some testing I found it was only getting 5V with very little current draw, if any.
I searched around for shorts, and didnt find any. No real signs of liquid damage etc.
Following a couple of questions from other members here I was able to further test voltages etc. Im now at a point where PP3V3_G3H is showing, but only at 2.23V.
I have 5v on the Enable pin.
Also the dual diode D6902 is showing :
5.19V @ Pin 1
0v @ Pin 2
4.15V @ Pin 3
L6900...Today, 07:03 AM -
by alltalkHi
Have one of these cheap laptops bios liocked - asks for password on boot.
Could someone remove the lock for me please?
Thank you...-
Channel: BIOS Requests ONLY!
Today, 08:09 AM -
-
by RusengaHie techs, I have a Hisense 55u7wf which is not powering on. Changed the power supply board but still nothing.
The power board has no stby voltage
It has 8v instead of 12v, 13v instead of 18v.
Somebody help me or may I have schematic diagram of the TV
Main board - RSAG7.820.9580/ROH
Power supply board RSAG7.820.8717/ROHToday, 10:24 AM -
by baglaivladHi. Please share your knowledge, which programmer can be used to flash firmware for MX25S6473F (SPI ROM, 4x4mm 8-XSON)? This IC can be found in MacBook Air M2 (A2681), U1900. Power and data are 1V25.
[URL]https://www.mxic.com.tw/en-us/products/NOR-Flash/Serial-NOR-Flash/Pages/spec.aspx?p=MX25S6473F&m=Serial%20NOR%20Flash&n=PM2860[/URL]https://Hi. Please share your knowle...ww.mxic.com.twYesterday, 11:42 AM -
by artesdevHi all.
Need the MS-17P1 Board view for an MSI GS77
Thanks in advance...-
Channel: Schematic Requests ONLY!
Today, 02:35 PM -
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by caribertHello everyone,
I'm looking for boardview and pdf files for A1706 motherboard 820-00239-09
Despite my efforts I have not found anything available.
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Today, 08:38 AM -
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by Johnny hHello,
I'm hoping someone can assist me.
I have an Asus Vivobook 16x Pro OLED laptop which has a BIOS password, and I can't seem to find it.
It still boots into Windows (boots from whatever SSD is installed but not from USB).
The model number is M7600R and serial number is N8N0CX03H71131C.
I tried AMITSESetup Decryptor but the password I got doesn't make sense (it's got a line break and special characters).
I also tried to use *************** MOD EDIT ,redacted************** and it also gave me the funny password of
[CODE]tmNx\'=QJQ...-
Channel: BIOS Requests ONLY!
Today, 06:13 AM -
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by EazyBoneAnother eazybone post took on this OLED now.
Symptoms. Hit power, white light shows briefly and then 5 blink red code. TCON issue per chart on first picture.
I'm thinking I have a power board issue though, which is one of the options
Now to check pin voltages from PSU to main and PSU to tcon
Pic 2
1 tcon on 12 -- 0v (when I hit power this goes to 3.1 stays for short time and back to zero)
2 bl err -- 0.16
3 evdd on --0
4. Ac off det 3.187
5 power on -- 3.362 BUT fluctuating randomly to 3.352
6 stby...10-24-2023, 09:09 PM -
by questoreHi Everyone,
I have brought to you a strange problem display maybe you have some ideas how it can be fixed or what could cause such a problem.
Display Type: B173ZAN01.1
MANUFACTURER: AU Optrinics
H/W:0A F/W:1
Changed the cable and tried to bend, push the back f the screen and both problem persists, nothing changes.
There is no any sign that the back of the screen was under pressure, or has moving cables.
PROBLEM 1:. Red spots / area in the screen
MORE INFO: If i gently press above the problematic area then it disappears until...-
Channel: Troubleshooting Computer Displays
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by usyusyI had dell 3542 with admin lock in bios, so downloaded latest bios from dell website (3442A16.bin), but could not able to match header or footer from backup file. Anyone can guide please, is it extractable or any other way to resolve the issue.
(Service Tag: 4FKC912)
Backup file:...-
Channel: BIOS Requests ONLY!
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