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Question posted by cozy40 on June 16th, 2019

No Signal

I have bought a new board but after connecting and starting the machine, no signal message appears on screen

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Answer #1: Posted by hzplj9 on June 18th, 2019 12:56 PM

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Without specific information regarding the procedure you have taken it is difficult to offer a solution. However you can download a maintenance manual from this link:

https://www.manualslib.com/manual/476642/Lenovo-Thinkcentre-M90z.html

Firstly you need to recheck you have correctly connected all the cables and installed the processor and memory. Check the power supply voltages are correct. If you still have problems then please raise another question with as much information of what you have done and the result of those tests.

Hope that helps.

Related Lenovo ThinkCentre M90z Manual Pages

Hardware Maintenance Manual for ThinkCentre M90z - Page 48

...the following : 1. Notes: a. Press Esc to return to save the new settings and exit the Setup Utility program. See "Starting the Setup Utility program" on page 39. 2. To view or permanently ...Defaults. 42 ThinkCentre Hardware Maintenance Manual Press F10 to the Startup menu. If you do one of the screen. 3. Then, you can do not want to return to save the new settings and ...

Hardware Maintenance Manual for ThinkCentre M90z - Page 56

...called out, make sure it is connected and/or enabled. See "Flash update procedures" on page 39. 2. Run the Setup Utility program, enable port 3. System board 014-027-XXX Parallel port Configuration...board 014-013-XXX 014-014-XXX Parallel port Control Signal/Loopback test failure System board 014-015-XXX Parallel port External Loopback failure 1. Go to reset the log file. 50 ThinkCentre...

Hardware Maintenance Manual for ThinkCentre M90z - Page 60

...page 39. 2. No action 1. System board 1. SCSI signal cable 2. SCSI device 4. If a component is called out, make sure it is called out is connected and/or enabled. See Chapter 6 "... and re-test. SCSI adapter card, if installed. 5. System board Information only Restart the test, if necessary. 54 ThinkCentre Hardware Maintenance Manual Restart the test to "Undetermined problems" on page...

Hardware Maintenance Manual for ThinkCentre M90z - Page 68

... correct the cause of the first error message, the other error messages probably will not appear on the screen the next time you have bootable media. 62 ThinkCentre Hardware Maintenance Manual Pressing Esc skips the full memory test Cannot find a suitable boot device. Make sure the keyboard is properly connected to the computer and that CMOS...

Hardware Maintenance Manual for ThinkCentre M90z - Page 76

... and mouse connector 21 SATA connector 22 SATA connector 23 Optical drive power connector 24 Low-voltage differential signaling (LVDS) cable connector 70 ThinkCentre Hardware Maintenance Manual System board part and connector locations 1 Microprocessor 2 Multi-touch board cable connector 3 Integrated camera cable connector 4 Memory slots (2) 5 Mini PCI Express slot 6 Ambient light sensor cable...

Hardware Maintenance Manual for ThinkCentre M90z - Page 84

...or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. Installing a memory module 7. Replacing...6. 5. Your computer has a special type of the new memory module into place. If you turn off the computer. 78 ThinkCentre Hardware Maintenance Manual Open the retaining clips. Press the ...

Hardware Maintenance Manual for ThinkCentre M90z - Page 85

...message will be displayed. Remove the computer cover. Install a new battery. Use the Setup Utility program to the "Lithium battery notice" in the ThinkCentre ...the screen is against the surface and the cover is turned on page 110. Reinstall the computer cover and connect the ...clean towel or cloth on page 70. 5. See "System board connectors" on the desk or surface. Figure 14. Turn ...

Hardware Maintenance Manual for ThinkCentre M90z - Page 86

... Locate the hard disk drive in the ThinkCentre Safety and Warranty Guide that are connected to remove it from the hard disk .... Removing the hard disk drive 5. Do not touch the circuit board 5 on how to remove the hard disk drive out of the... provides instructions on the bottom of the bracket. 6. To install the new hard disk drive into the bracket 7. Installing the hard disk drive into...

Hardware Maintenance Manual for ThinkCentre M90z - Page 87

Slide the new hard disk drive with your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with the bracket into.... Chapter 8. Replacing FRUs 81 Press the handle of the ThinkCentre Safety and Warranty Guide, go to replace the optical drive. Figure 18. Installing the hard disk drive 8.

Hardware Maintenance Manual for ThinkCentre M90z - Page 88

...into position. 82 ThinkCentre Hardware Maintenance Manual Then, disconnect all power cords from the drives and turn off all cables that the screen is against the... surface and the cover is available only in some models. Remove the computer cover. To install a new optical drive, slide the new optical drive into the optical drive bay until it down so that are connected...

Hardware Maintenance Manual for ThinkCentre M90z - Page 91

... connected to free it down so that came with the corresponding holes in the ThinkCentre Safety and Warranty Guide that the screen...new heat sink on page 83. 5. To obtain a copy of your computer or attempt any repair before removing the computer cover. Turn off the computer and wait three to five minutes to access the microprocessor 3 . See "Replacing the heat sink" on the system board...

Hardware Maintenance Manual for ThinkCentre M90z - Page 92

... of the microprocessor. c. Do not drop anything onto the microprocessor socket while it is important when installing the new microprocessor on the system board. Notes: a. b. d. 6. Lift the microprocessor straight up and out of the microprocessor in the socket. Note... is exposed. The socket pins must be kept as clean as possible. 86 ThinkCentre Hardware Maintenance Manual

Hardware Maintenance Manual for ThinkCentre M90z - Page 94

...the WI-FI card to the computer. 2. Carefully remove the two screws that are connected to the system board. Press the new WI-FI card firmly and then pivot the WI-FI card to remove it down ... before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that the screen is against the surface and the cover is available only in the system...

Hardware Maintenance Manual for ThinkCentre M90z - Page 95

... the drives and turn off all cables that the screen is against the surface and the cover is secured into the computer front bezel and then press the new Bluetooth module downward until it down so that are connected to the system board. Position the new Bluetooth module into place. 9. Install the two screws to...

Hardware Maintenance Manual for ThinkCentre M90z - Page 96

.... 2. Figure 28. To obtain a copy of your computer and gently lay it down so that are connected to secure the multi-touch board. 90 ThinkCentre Hardware Maintenance Manual Removing the multi-touch board 7. Remove all cables that the screen is against the surface and the cover is available only in some models. Place a soft, clean...

Hardware Maintenance Manual for ThinkCentre M90z - Page 97

...See "FRU locations" on page 70. 9. Removing the ambient light sensor 6. Connect the new multi-touch board cables to :http://www.lenovo.com/support This section provides instructions on the ...the new ambient light sensor with your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that the screen ...

Hardware Maintenance Manual for ThinkCentre M90z - Page 98

... or surface. Connect the new ambient light sensor cable to "Completing the parts replacement" on how to the computer. 2. To replace the ExpressCard, do the following: 1. 8. Go to the system board. To obtain a copy of your computer. Note: The ExpressCard is available only in the ThinkCentre Safety and Warranty Guide that the screen is against...

Hardware Maintenance Manual for ThinkCentre M90z - Page 99

...speakers in the ThinkCentre Safety and Warranty Guide that the screen is against the surface and the cover is facing up. 3. Align the screw holes in the new ExpressCard with ...the drives and turn off all media from the system board. 7. Remove the rear I /O assembly cover" on the desk or surface. Connect the new ExpressCard to replace the internal speakers. Remove all attached ...

Hardware Maintenance Manual for ThinkCentre M90z - Page 100

... then position the new internal speakers on how to the front bezel. 10. See "System board connectors" on the desk or surface. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:http://www.lenovo.com/support This section provides instructions on the front bezel so that are connected to secure each...

Hardware Maintenance Manual for ThinkCentre M90z - Page 101

... camera cable and then position the new integrated camera with your computer and gently lay it down so that are connected to the system board. Connect the integrated camera cable to the computer. 2. Chapter 8. Place a soft, clean towel or cloth on page 70. 6. Note the routing of the ThinkCentre Safety and Warranty Guide, go to...