the code of version 5004 is more credible ,POST card self-test is more detailedUsers guide of four-bit code POST card This Users guide is fit for the common computer post card (the PI0050) and the note book computer post card (M04). 四位代码形电脑主板故障诊断卡使用说明（There are editions in Chinese for you to choose）可选配中文说明书 Not only diagnose the trouble of main board but also the trouble of the POST card, keep users from misunderstanding . More compatible with main board PIV, end the history that the POST card is unable to work as the main board update constantly. You can consult the code that has run; Press the switch once and the code pauses It do no harms to device while insert the card wrongly with a speaker on the card to remind you there is an error, SMD device that protect your hands. Test the speed of PCI and ISA bus of the computer, you will get the result as soon as you test it. It can help you not suffer losses when you buy the computer, and also help you sell the computer that has a fast bus speed at good price. . CatalogueI、Front View 2II、Implication of word/number of four-bit code POST card 3 III、Flow chart 4 、Distinguish true and false 7、OBLIGATORY CONTENT 7 、Description of LED displays 8 、Error code table 8 、Description of beep code 30 、 Frequently-asked questions 34I、 Front View This card that named PI0050 is fit for common computer This card named M04 is fit for notebook computer.II、Implication of word/number of four-bit code post cardword/NUMDescriptionStart automatic diagnosis after it displayed for about half a second1The first function symbol of main menu ,then enter code consulting function after it displayed for about half a second2The second function symbol of main menu , then display the reference speed of bus after it displayed for about half a second3The third function symbol of main menu ,display the versionnumber5002 after it displayed for about half a second4The fourth function symbol of main menu, start to test the card and display from 0000、1111 to FFFF after it displayed for about half a second5The 5th function prompt ,start self-test after the prompt displayed for about half second. .As long as each of 4 bits can display symbols, no matter what it displays, the POST process passed. Because of the POST content has been enhanced a lot, plenty of symbols are especial . you can pay no attention to it.P C IIt indicates that the slot you insert the card is PCI slot, and wait for you to consult the next code by pressing function switch.I S AIt indicates that the slot that you insert the card is ISA slot. And wait for you to consult the next code by pressing function switch.Waiting for you to consult the next code by pressing the function switch. After it displayed for half a second, the code will be displayed, and the first two bits indicates the hexadecimal error code .The last two bits indicates the ordinal number of the code.Waiting for you to consult the preceding code by pressing the function switch. After it displayed for half a second, the code will be displayed, and the first two bits indicates the hexadecimal error code, the last two bits indicates the ordinal number of the code.E n dThe last code( ordinal number limit: 0-47) forward consulting is displayed; press and hold the function switch for some 0.8 second, then enter the backward consulting mode and display P- - -, after half a second, the code is displayed, the first two-bit code indicates the 47th POST code, the last two-bit code(47) indicates the ordinal number of the code; if press and hold the function switch for about 0.8 second twice, it will exit the code consulting and enter the second function of main menu, at the same time displayed 2- - -, then display the reference speed of PCI/ISA bus in decimal in half a second.E n dThe first code (ordinal number limit : 0-47) backward consulting is displayed; Press and hold the function switch for 0.8 second, then enter the forward consulting mode and display- - -P, after half a second, the code is displayed, the first two-bit code indicates the zero code; the last two-bit code (00) indicates the ordinal number of the code. If press and hold the function switch for about 0.8 second twice, it will exit the code consulting and enter the second function of main menu, at the same time displayed2- - - , then display the reference speed of PCI/ISA bus in decimal in half a second.III. Flow chart