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Over the past few days, some of our users have reported that they have encountered troubleshooting on a simple 8086 based microcomputer.

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This article will teach you how to troubleshoot a fast microcomputer system like SDK-86 card

Identify Symptoms
List the symptoms for those you find. You can determine if the problem is with the system or with the person using the machine.

Conduct a thorough and attractive visual inspection.
Check which components were really hot.
Ensure that the integrated circuits are practically firmly seated in their sockets and that there are no rounded pins on the integrated circuits.
Check for broken and loose wire connections or possibly a thin film of dust, etc.
check with a multimeter to check your suspicions.

Check control power supplyi
Determine the supply voltages in the manual and check the corresponding supply voltages on the corresponding pins of other integrated circuits to ensure that the voltage actually reaches this level.

Movie Call Signal
Quickly check some necessary signals around the microprocessor processor. If the problem is serious, the IC can help you report the problem.
Check the clock transmission with an oscilloscope.
Check available processor outputs such as RD WR and ALE Are.
Check the bus limit to see if there is traffic on the buses. If these buses are only active, then a known issue is that the CPU is idle or in case of problems with reset or some TTL devices.

Systematically Maintained Replaceable Integrated Circuits
The simplest replacement option is that the customer has two identical microprocessors, one provides and the other does not, and the integrated circuits of both blocks are shown in parentheses. check integrated circuits for presystem malfunction.

Microcomputer Troubleshooting Hardware
Logic Analyzers
A logic analyzer is very effective for troubleshooting, but to use it effectively, customers will need detailed knowledge and a list of software for the system they are using. They usually try to fix Errors. Details

You can purchase a metering microprocessor and interfaces from DOUGLAS V HALL to perform troubleshooting steps. This post is based on the assumption that the steps given assume the book

You may also be interested in:
:: assembly language programs for calculating the expression
:: connecting an analog-to-digital converter from 8255 to 8086
:: connecting a digital-to-digital converter analog converter on an 8086 with 8255

Processor Troubleshooting Techniques

Processors are usually very reliable. Most PC problems will be related to othersHowever, if you suspect a processor, there are usually several steps you can take to get it done.o Repair the game. It is easier to successfully start the microprocessor throughwell known for his retirement. If the problem goes away, then the previous processor is defective.If the problem persists, the problem may be elsewhere.

Table 3.44. Troubleshoot processor issues

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colspan = “1” Identifying the problem	colspan = “1” Possible cause	colspan = “1” permission
colspan = “1” System does not work, new cursor, no beep, no fan	colspan = “1” Faulty power cord	colspan = “1” Just plug in or replace the power cord. However, the power cords can be damaged. read well.
	Power failure	Replace the power supply. Use this known part for testing.
	Failure of the mother you	Replace the motherboard. Use a known good replacement part for testing.
	Memory error	Also delete every memory except bank 1, check again. If the system still doesn’t work Snow changing bench 1.
The system does not work, the number beeps or crashes before starting POST	Not all components downloaded or installed incorrectly	Check all peripherals, especially memory and graphics card. Replace all circuit boards and outlet components.
The system beeps at startup, the fan is spinning, there is absolutely no cursor on the screen.	Video card inserted incorrectly or faulty	Reinstall or replace the video card. Use well-known testsx purposes.
colspan = “1” Blocked during or shortly after POST	colspan = “1” Poor heat dissipation	colspan = “1” Check CPU heatsink / fan; change if necessary, use with good capacity.
	Incorrect voltage settings	Set the motherboard to the correct voltage for the main processor chip.
	Incorrect motherboard movement speed	Set the motherboard to a consistent speed.
	Bad CPU wall clock multiplier	Jumper on motherboard for symmetric clock multiplier.
Invalid processor identification during POST	Old BIOS	Update manufacturer BIOS.
	Map is not configured correctly	Check manual and jumper board to make sure bus and multiplier are correct. Settings.
Running application won’t start	Poor high power dissipation	check the fan; Replace processor if necessary; larger heatsink may be required.
	Incorrect voltage settings	Jumper on the motherboard for the required base voltage.
colspan = “1”	colspan = “1” Incorrect motherboard bus speed	colspan = “1” Jumper on the motherboard in terms of correct speed.
	Bad CPU clock multiplier	Jumper on the motherboard to indicate the correct clock multiplier.
	Apps definitely won’t install or run	Inappropriate drivers or incompatible hardware; Updating drivers and searching Compatibility issues.
The system is running, but the reception is not displayed	Monitor is off or just broken	Check your monitor and turn it on. Replace with a known replacement test.

If it is often misrecognized during POST processing,Your motherboard settings may be wrong or your BIOS must be correctUpdate. Make sure the motherboard is plugged in frequently or configured correctly.Processor for this and make sure you have the latestMy BIOS version.Motherboard.

If the device is unstable after warming up, try settingLow speed processor. If the problem persists, the processormay be defective or overclocked.

Many hardware problems are actually hidden software problems. Make sureYou have the latest BIOS for your motherboard, as well as new drivers forall your peripherals. It also allows you to use the latest version of a specific version.The operating system, because there are fewer problems in general.

 

 

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