Hi,
I am trying to help someone to repair a mac mini A1993 820-00939.
The mac mini won't power on.
Voltages on U7800 are all good except
PP1V2_PRIM 0v
PP1V_PRIM 0v
PP5V_G3S is missing too
Someone has the power on sequence of this ?
Thank you on advance.
Eric...
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by sauceToday, 12:53 AM
-
by vpowerHi,
I have this dead laptop, if I plug the charger I see only charging led light blinking 3 times.
I disassembled it, removed the battery and checked with my multimeter:
red arrow input connector 19v
green arrow first mosfet drain 19v
white arrow first mosfet source 3v
yellow arrow second mosfet 19v
pink arrow 3v
blue arrow third mosfet shorted to ground
current resistor 3 volts on both sides
Any advice? I have a thermal camera and I could inject low voltage if needed.
Thanks...Today, 01:24 AM -
Hi my friend,
I want download this link:
[url]https://support.industry.siemens.com/cs/attachments/109763408/SIMATIC_IPC427C_HMIIPC477C_HMIIPC477CPRO_HMIIPC577C_V120105.zip[/url]
but I couldn't.
who can help me?https://Hi my friend,<br /> I want d...o can help me?Hi my friend,
I want download this link:
[url]https://support.industry.siemens.com/cs/attachments/109763408/SIMATIC_IPC427C_HMIIPC477C_HMIIPC477CPRO_HMIIPC577C_V120105.zip[/url]-
Channel: BIOS Requests ONLY!
Today, 12:58 AM -
-
by timonix20hello everyone I am looking for a solution for my tv, I think corruption of the eemc,
the TV starts, LG logo, then nothing (rear backlight)
no reaction to rear command or infrared
the usb procedure that I tried on the LG site is a procedure with the screen and the remote control so I can't.
I have a chance with a usb procedure or other if you have .bin
if any people have this main board
Sony LG 60la620s EAX64797004 (1.1)
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"1713895782944.jpg","data-attachmentid":3258485}[/ATTACH]...Yesterday, 01:52 PM -
by ryogadan78Hi guys, I have this 2011 iMac A1311 with a strange problem.
Most of the time, when I plug in the power cord, the first of the 4 LED's turn on, but when I press the power switch the LED turns off and iMac won't boot up.
Sometimes, when I unplug and plug the power cord back in, iMac starts up correctly by turning on the 4 LEDs in sequence.
I have already tried a new power supply, but the result does not change. Do you have any suggestions?
Motherboard 820-3126-A04-06-2024, 05:19 AM -
Hello, I have a legion pro 5 16arx8 serial number pf4bf4aw mb code nm-f251 rev1.0 which was dissasembled by the client for cleaning. Now it does start but for 20 secs after that fans run at maximum and then shut down. Found PU8302 burned but cannot identify it the part. It is written eHFAA on it but didn't found any info, no boardview, nothing. Can anyone help identify the part so I can order it from somwhere? Ataching some pictures of the motherboard, serial number and part. Than\k you...
-
Channel: Schematic Requests ONLY!
Today, 12:49 AM -
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by syedlaiqHi All,
i have This HP consumer series laptop HP 15-ac with Motherboard number La-c701p.
Issues - Low Load (only200ma),Powers on but No Display, capslock blinking every 4sec.
Tried - Fresh Clean Bios, ram ic change, crystal change.
All Voltages Present.
Thank sin Advance...Today, 12:32 AM -
by cygronLaptop Model - Lenovo B590
Type - 6274
S/N - WB13087494
P/N -59399883
M/O - WB03102501
Board id - LA58MB 11273-3 48.4TE06.031
EC - Nuvoton NPCE885GA0DX
Need BIOS and EC. I don't have backup bios and ec because laptop came with wrong bios flashing.-
Channel: BIOS Requests ONLY!
Yesterday, 11:47 PM -
-
by abajorI've gotten into the habit of Looking at peoples Mechanical Hard drives with a Ubuntu thumb drive to boot their system.
I understand the raw values are not really uniform between manufacturers, but I have noticed that high seek and read error raw values at the very least correlate to a drive that is going to have sub par access time, and extremely slow OS booting.
The odd thing is I've often seen very high seek and read error rates on drives with fairly low on time.
Does anybody have any other takes on evaluating smart data? I've used Crystal Disk Info, It seems to present...-
Channel: General Computer & Tech Discussion
Yesterday, 11:43 PM -
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by reformattCouple of Windows 11 machines have come in this week with the same issue. After you login, the taskbar will not appear (or just be a black bar). No access to Start Menu. Task Manager (use CTL+SHIFT+ESC) works, however the Performance stats seem stuck with CPU on 100% for Task Manager itself. Trying to exit Task Manager result in it hanging as well. No issue if you boot into Safe Mode.
First machine, tried many things to no avail (System Restore from last Windows update, rebooting in Diag mode, trying to reinstall Windows Apps via Powershell). In the end, I did an in-place upgrade...Yesterday, 10:16 PM
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by timonix20hello everyone I am looking for a solution for my tv, I think corruption of the eemc,
the TV starts, LG logo, then nothing (rear backlight)
no reaction to rear command or infrared
the usb procedure that I tried on the LG site is a procedure with the screen and the remote control so I can't.
I have a chance with a usb procedure or other if you have .bin
if any people have this main board
Sony LG 60la620s EAX64797004 (1.1)
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"1713895782944.jpg","data-attachmentid":3258485}[/ATTACH]...Yesterday, 01:52 PM -
by reformattCouple of Windows 11 machines have come in this week with the same issue. After you login, the taskbar will not appear (or just be a black bar). No access to Start Menu. Task Manager (use CTL+SHIFT+ESC) works, however the Performance stats seem stuck with CPU on 100% for Task Manager itself. Trying to exit Task Manager result in it hanging as well. No issue if you boot into Safe Mode.
First machine, tried many things to no avail (System Restore from last Windows update, rebooting in Diag mode, trying to reinstall Windows Apps via Powershell). In the end, I did an in-place upgrade...Yesterday, 10:16 PM -
by abajorI have the above mentioned MBP, quick scan with thermal camera revealed that only U3200 was heating up. I found that C3208, C3219 and C3205 were all reading ~6.8ohms to ground.
so I swapped U3200.
I connected the PSU again for a quick check on thermal it's drawing about the same amount of current but now I'm seeing only heat radiating from U7800 and the T2 chip from under the black shielding fabric, and the bottom of the board.
It's hard to judge the actual temperature without removing the shielding.
Does anybody have any insights?
PPBUS_G3H is...Yesterday, 06:07 PM -
by vpowerHi,
I have this dead laptop, if I plug the charger I see only charging led light blinking 3 times.
I disassembled it, removed the battery and checked with my multimeter:
red arrow input connector 19v
green arrow first mosfet drain 19v
white arrow first mosfet source 3v
yellow arrow second mosfet 19v
pink arrow 3v
blue arrow third mosfet shorted to ground
current resistor 3 volts on both sides
Any advice? I have a thermal camera and I could inject low voltage if needed.
Thanks...Today, 01:24 AM -
Hi my friend,
I want download this link:
[url]https://support.industry.siemens.com/cs/attachments/109763408/SIMATIC_IPC427C_HMIIPC477C_HMIIPC477CPRO_HMIIPC577C_V120105.zip[/url]
but I couldn't.
who can help me?https://Hi my friend,<br /> I want d...o can help me?Hi my friend,
I want download this link:
[url]https://support.industry.siemens.com/cs/attachments/109763408/SIMATIC_IPC427C_HMIIPC477C_HMIIPC477CPRO_HMIIPC577C_V120105.zip[/url]-
Channel: BIOS Requests ONLY!
Today, 12:58 AM -
-
by sauceHi,
I am trying to help someone to repair a mac mini A1993 820-00939.
The mac mini won't power on.
Voltages on U7800 are all good except
PP1V2_PRIM 0v
PP1V_PRIM 0v
PP5V_G3S is missing too
Someone has the power on sequence of this ?
Thank you on advance.
Eric...Today, 12:53 AM -
Hello, I have a legion pro 5 16arx8 serial number pf4bf4aw mb code nm-f251 rev1.0 which was dissasembled by the client for cleaning. Now it does start but for 20 secs after that fans run at maximum and then shut down. Found PU8302 burned but cannot identify it the part. It is written eHFAA on it but didn't found any info, no boardview, nothing. Can anyone help identify the part so I can order it from somwhere? Ataching some pictures of the motherboard, serial number and part. Than\k you...
-
Channel: Schematic Requests ONLY!
Today, 12:49 AM -
-
by syedlaiqHi All,
i have This HP consumer series laptop HP 15-ac with Motherboard number La-c701p.
Issues - Low Load (only200ma),Powers on but No Display, capslock blinking every 4sec.
Tried - Fresh Clean Bios, ram ic change, crystal change.
All Voltages Present.
Thank sin Advance...Today, 12:32 AM -
by cygronLaptop Model - Lenovo B590
Type - 6274
S/N - WB13087494
P/N -59399883
M/O - WB03102501
Board id - LA58MB 11273-3 48.4TE06.031
EC - Nuvoton NPCE885GA0DX
Need BIOS and EC. I don't have backup bios and ec because laptop came with wrong bios flashing.-
Channel: BIOS Requests ONLY!
Yesterday, 11:47 PM -
-
by abajorI've gotten into the habit of Looking at peoples Mechanical Hard drives with a Ubuntu thumb drive to boot their system.
I understand the raw values are not really uniform between manufacturers, but I have noticed that high seek and read error raw values at the very least correlate to a drive that is going to have sub par access time, and extremely slow OS booting.
The odd thing is I've often seen very high seek and read error rates on drives with fairly low on time.
Does anybody have any other takes on evaluating smart data? I've used Crystal Disk Info, It seems to present...-
Channel: General Computer & Tech Discussion
Yesterday, 11:43 PM -