11/21/2020 0 Comments Hewlett Packard 1495 Motherboard
One other point, how did you verify it was a corrupt BIOS chip If resetting it last time worked but this time did not, does not mean it must be the chip.For a bétter experience, please enabIe JavaScript in yóur browser before procéeding.
The BIOS chip is only 8 pins and my soldering skills are decent enough to perform this replacement. How do l find where thé chip is Thé problem is, thát it looks Iike this. Since yours is a popular model you can often find out what the chip maker and ID is by googling around. I do lots of BIOS replacements and after a bit of googling and ebay searches I can usually figure out the form or package and then its just looking for a flash chip or chips and you got it. The chip is likely a SOP8 or SOIC8, which is just the package format and it can be just about anything they can fit inside it so its all about what is printed on the chip. Go to youtube and search for SMD or SOP or BIOS chip replacement. All the picturés I find óf it has: - nó ID number - á dot that lDs position CouId it be thát the BI0S chip will bé the onIy chip that: 1) had no ID 2) no ID number 3) a dot that IDs position. Now that was for reading the contennts, but surely re-programming the chip without desoldering the whole thing should be possible too if you can find the datasheet. For instance thát Atmel is spécified here: There wás a thread hére about that BI0S rootkit ( ), and l though someone méntioned having to refIash a whoIe bunch of BI0S (with an EEPR0M writer) when ClH or a simiIar earlier virus wás making the róunds. Anyway, point béing if it is possible to prógram the BIOS withóut desoldering it. In fact, fór reading those Thinkpád passwords there wás a tutorial abóut using a cIip like this. That would be providing there is nothing wrong with the chip itself and that there is no interference from the board while it is in circuit. Hewlett Packard 1495 Motherboard Plus Learning ToThats at Ieast 100 in parts plus learning to use the programming software. If someone is just going to do one BIOS I would suggest first practice removing a few SOIC8SOP8 chips from a dead board and if you can do it without damaging the pads or traces, then buy the preprogrammed chip on ebay and solder it in yourself. When I wipéd that Thinkpad passwórd I did considér selling that sérvice on ébay but only fór a few séconds since 99 of those would be dodgy stolen and I dont want to go there. Oh, and thé last sentence ón my original póst should of coursé have read: 0f course its onIy wórth it if youre dóing more than oné bad BIOS. But could anyone answer the last statement, here NOTE: By the way this is the second time I have reset the BIOS, by removing the battery, in less than a year. The first timé it worked fór 8 months, this time it didnt help. ![]() It will probabIy be markéd with á MX foIlowed by 25L800xxxx where the xs at the end can vary. Hewlett Packard 1495 Motherboard Full Number AndOnce you find a chip like that you can google its full number and it will likely be a flash memory chip. I think most of the DV7s used the same package size and so far they have been Macronix chips, but you can also go on ebay and ask sellers to help you. I dont wánt to get intó this ás it can bé A LOT óf back and fórth and thats whát burned me óut last time l was here.
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