Jurors started their deliberations again at 9:15 a.m. this morning, after sending Judge Amy St. Eve a note yesterday saying they were deadlocked on one count.
To address questions: The judge does have the option of accepting a partial verdict on the counts, which jurors have unanimously decided. She would declare a mistrial on the remaining counts. The prosecution then would have the option to retry those counts. If it's just a few counts, the prosecution would probably decline. If it's the whole case, the prosecution would likely retry.
In the high-profile trial of Conrad Black, a case which St. Eve also oversaw, she sent a partially deadlocked jury back a couple of times to reach its decision.