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Safe Mode; Test With Verified Working Configuration (Hardware And/Or Operating System); 13. Replace The System Board - Hp Zbook 17 G4 Mobile Workstation Maintenance And Service Manual Hide thumbs 1 2 3 4 5 6 Table Of Contents 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183

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NOTE: After the service door is removed, disconnect all connections (internal keyboard, display, discrete GPU, hard drive/solid-state drive, daughterboards, etc.) to achieve the essential hardware configuration above. DO NOT disassemble the system board from its enclosure at this time. Reverse the procedure above by reinstalling each piece of hardware removed, one piece at a time, and testing your computer after each installation. Since your computer works with only the essential hardware installed, those parts must be working properly. This means that one of the hardware components removed is causing the computer to not work properly. By installing each device back into the computer and testing each time, the failing hardware will eventually be identified.

Safe mode

A driver conflict often results in a blue screen error message. Therefore, booting in safe mode can resolve many issues in Windows because safe mode forces the computer to load a limited version of Windows which only contains essential files. Safe mode is useful for troubleshooting problems with programs and drivers that might not start correctly or that might prevent Windows from starting correctly. If a problem does not reappear when you start in safe mode, eliminate the default settings and basic device drivers as possible causes. Refer to the links below for how to start your computer in safe mode: HP PCs – Windows 7 Safe Mode: ● ● HP PCs – Windows Safe Mode (Windows 10, 8):

12. Test with verified working configuration (hardware and/or operating system)

One troubleshooting technique that can quickly isolate an issue is using a verified working part while testing. A good example is to use an external keyboard, mouse, or VGA monitor when you have issues with an internal keyboard, TouchPad, or display. Testing with a verified working AC adapter can identify an error caused by a faulty one. Similarly, testing with a verified working operating system can determine bad behaviors of the current operating system. See a Windows-To-Go USB. NOTE: In some situations, more than one item may contribute to a problem.

13. Replace the system board

The system board may be replaced only by authorized service providers. This should not be considered an initial step taken to resolve an issue. Review and perform all steps discussed previously before replacing the system board. lights, and POST error messages on page on page 91, and/or without requiring the effort of replacing unnecessary hardware. Review Table 7-1 Troubleshooting methodology and general troubleshooting steps on page 76 appropriate troubleshooting steps. IMPORTANT: other troubleshooting options. NOTE: Determine whether a previous service case might be related to the current problem. For example, a fan detection issue may be caused by a loose connection resulting from previous service. TIP: Without an RTC battery (3V coin-cell battery), the computer automatically reboots. This is a useful feature when the power connector cable (between external AC adapter and system board) is defective. http://support.hp.com/us-en/document/c01835750 Non HP diagnostics tools on page 84 4. Update BIOS and drivers on page 10. Reseat cables and connections on page 91 System board failure is not common. Do not replace the system board until you have tried all http://support.hp.com/us-en/document/c03439317 80, 7. Status lights, blinking light codes, troubleshooting 85, 8. Hard reset on page for instructions about obtaining and using 90, and 9. Soft reset (Default Settings) can resolve many system board issues General troubleshooting steps for 93 Table of Contents Previous Page Next Page

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Table of Contents

Troubleshooting

Troubleshooting guide 87
Resources 88
Status lights, blinking light codes, troubleshooting lights, and POST error messages 97
Power Good (Troubleshooting) lights 101
Microsoft general troubleshooting of Windows bug check codes 159

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