Moreover, overheating your laptop might a graphics card crash, which would have corrupted your video display. Over time internal cables in your laptop wear out, and a damaged internal cable might cause the problem. Hardware Errors Like Disk Errors or Graphical Card ErrorsĪs seen in many cases, one of the common causes of your Lenovo laptop's black screen is related to hardware glitches in different components. Here're some of the key factors that lead to such problems: 1. Now, the fact that your Lenovo laptop's black screen could result from numerous possible reasons sometimes makes it difficult to find the real cause. POST done, prepare to boot operating system.ĭo OEM (original equipment manufacturer) initialization.For macOS X 10.10 or later Part 1: Reasons for Lenovo Laptop or ThinkPad Black Screen Initialize local bus hard disk controller. Initialize manager for PCI (Peripheral Component Interconnect) options ROMs.ĭetect and install external parallel ports. Load alternate registers with CMOS (complementary metal-oxide semiconductor) values. Load alternate registers with initial POST values.Ĩ237 DMA (direct memory access) controller initialization. Initialize chipset registers with initial POST values. Reseat RAM chips or replace RAM chips as possible solution. Problem with SIMM (single inline memory module).īelow are the beep codes for Phoenix BIOS Q3.07 or 4.x. Problem with logic board or SCSI (small computer system interface) bus. Video (Mono/CGA display circuitry) issue.Įrror tone. POST error, review screen for error code. However, because of the wide variety of models shipping with this BIOS, the beep codes may vary. IBM BIOS beep codesīelow are general IBM BIOS beep codes. Dell beep codes Beep Codeįor other Dell beep codes, please refer to Dell's beep codes and PSA diagnostics chart page. If any other correctable hardware issues are found, the BIOS displays a message. Issue with the processor (CPU), possibly damaged. Repeated beeps alternating high & low frequency. Repeated high frequency beeps while PC is running. Video card not detected (reseat video card) or bad video card.

Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. Low CPU (central processing unit) fan speed, voltage level issue.īelow are the Award BIOS beep codes. Beep CodeĭRAM (dynamic random access memory) refresh failure. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes for your computer may differ slightly from those listed below.

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