decode Posted October 11, 2017 Share Posted October 11, 2017 hi all, wondering if someone can give an idea of which way i should go. my eBay purchased ( chinese junk maybe??) has no display. starts up and led is green on jamma board and fans are working. i have taken the board out for any potential DIY work, but anyway give me some advice please on what way i should go? the unit was hardly used, should i consider getting a new jamma and PC system and plug it back in? would a jamma pi an alternative.... buttons, joysticks and unit all in excellent condition. i tested another monitor with different vga lead and still not working any pointers please? Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 11, 2017 Share Posted October 11, 2017 Are you getting any output from the VGA connector on the motherboard, with/without the jamma harness connected? The top blue board interface will not function without the bottom motherboard working. Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 decode Posted October 11, 2017 Author Share Posted October 11, 2017 i get no signal message on monitor on startup up then nothing. tried 2 monitors and no display showing. without harness you don't get the message no signal Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 11, 2017 Share Posted October 11, 2017 Hmmmm - have you tried switching ram/power supply? Seems like an issue with the motherboard.... Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 decode Posted October 11, 2017 Author Share Posted October 11, 2017 will look at ram next. worse case, where can i find multi-board including PC as a replacement? vertical and horizontal screen games. Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 11, 2017 Share Posted October 11, 2017 From my understanding, the blue board is transferable to any other motherboard that has the same I/O connectors. Do you have another you could test it with? Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 decode Posted October 11, 2017 Author Share Posted October 11, 2017 nar...... looking on web to find motherboard for jamma, not easy to find Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 11, 2017 Share Posted October 11, 2017 Sorry - to clarify, I mean the blue board on top that has the jamma interface that is probably ok. The bottom blue motherboard needs replacing (potentially). Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 Vadership Posted October 11, 2017 Share Posted October 11, 2017 The symptoms your having also tell me the bottom board has taken a dump. Bottom board (motherboard) on these type boards have a very high failure rate for whatever reason. Sometimes I've had the bottom board and the CPU go at the same time... Finding replacements for them is getting harder these days. Link to comment Share on other sites More sharing options...
0 Ballypinball Posted October 11, 2017 Share Posted October 11, 2017 They are using this normally upright system in a table, they use 20 year old used ide hard drives Normally the transistors short out on the bottom board, we should have some spare bottom boards arriving this week, we bought some to repair some customers who had the same system Link to comment Share on other sites More sharing options...
0 Administrators Arcade King Posted October 11, 2017 Administrators Share Posted October 11, 2017 Just Pi it. Link to comment Share on other sites More sharing options...
0 decode Posted October 11, 2017 Author Share Posted October 11, 2017 ok thanks. how do i progress this please? thanks to all Link to comment Share on other sites More sharing options...
0 Administrators Arcade King Posted October 11, 2017 Administrators Share Posted October 11, 2017 ok thanks. how do i progress this please? thanks to all Have a look at our sponsor @dee2eR section who makes the Raspberry Jamma. Loads of info in there and the support is 1st rate. Link to comment Share on other sites More sharing options...
0 decode Posted October 11, 2017 Author Share Posted October 11, 2017 ok thanks. also will look at replacing the bottom and pi option. - - - Updated - - - They are using this normally upright system in a table, they use 20 year old used ide hard drives Normally the transistors short out on the bottom board, we should have some spare bottom boards arriving this week, we bought some to repair some customers who had the same system thanks, how do i explore getting another board? Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 11, 2017 Share Posted October 11, 2017 You could look at eBay for a similar board. What's the socket? 475? Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 decode Posted October 12, 2017 Author Share Posted October 12, 2017 You could look at eBay for a similar board. What's the socket? 475? thanks..... ummm how can i tell? thats the CPU side of things? Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 12, 2017 Share Posted October 12, 2017 Take off the heatsink and check... Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 decode Posted October 12, 2017 Author Share Posted October 12, 2017 Take off the heatsink and check... Sent from my LG-H990 using Tapatalk ok will do and report back Link to comment Share on other sites More sharing options...
0 decode Posted October 12, 2017 Author Share Posted October 12, 2017 i had a look i couldnt tell after lifting the heatsink . i didnt left the chip of the board using the leaver could i just replace the bottom board and plug in the jamma to plug n play in the current cabinet Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 12, 2017 Share Posted October 12, 2017 ... potentially, though you need the software of the current HDD or use an image similar to the custom one noted on the forums. Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
0 Ballypinball Posted October 12, 2017 Share Posted October 12, 2017 I tried all that, can't find a board the same physical size, even when I found the same type different size drivers are needed and all in Chinese Should have boards arriving tomorrow Link to comment Share on other sites More sharing options...
0 decode Posted October 15, 2017 Author Share Posted October 15, 2017 all, thanks for your tips. i think i have got a solution sorted. just got another 1505 in 1 board..... Link to comment Share on other sites More sharing options...
0 bboy_h Posted October 15, 2017 Share Posted October 15, 2017 Let us know how you go. Sent from my LG-H990 using Tapatalk Link to comment Share on other sites More sharing options...
Question
decode
hi all,
wondering if someone can give an idea of which way i should go.
my eBay purchased ( chinese junk maybe??) has no display. starts up and led is green on jamma board and fans are working.
i have taken the board out for any potential DIY work, but anyway give me some advice please on what way i should go?
the unit was hardly used, should i consider getting a new jamma and PC system and plug it back in? would a jamma pi an alternative....
buttons, joysticks and unit all in excellent condition.
i tested another monitor with different vga lead and still not working
any pointers please?
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